Some standard content:
ICS01.140.20
National Standard of the People's Republic of China
GB/T21712-2008
Technical Specifications and Quality Requirements for the Restoration of Ancient Books
The Standard for the Restoration and Control of Ancient Books2008-04-23Issued
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of ChinaStandardization Administration of the People's Republic of China
2008-07-01Implemented
Standard Name
1Scope
2Terms and Definitions
3Process Flow
4Process Requirements
5Inspection
6Quality Grade
GB/T21712—2008
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This standard was proposed by the Ministry of Culture of the People's Republic of China. This standard was drafted by the National Library of China.
The main drafters of this standard are Du Weisheng and Zhang Ping. Foreword
217122008
1 Scope
Technical specifications and quality requirements for restoration of ancient books
This standard specifies the basic terms and definitions, technical specifications and quality requirements for restoration of ancient books. GB/T217122008
This standard applies to the restoration of ancient books and is used for publishing, teaching, scientific research and related technical business exchanges at home and abroad. 2 Terms and definitions
The following terms and definitions apply to this standard. 2.1 Ancient books
Refers to books written or printed before 1912 in the form of Chinese classical binding, which is the abbreviation of ancient Chinese books. 2.2 Scrolls
After the leaves of a book are glued in order, the ends are glued to a round shaft made of wood or other materials, and the head end is glued to a thin wooden rod, and then the tail shaft is used as the axis to roll forward to form a bundle of binding forms. 2.3 Buddhist-classic binding Rub the palm leaves or rectangular paper leaves with literary content in order, clamp them with a board on the top and bottom, and then punch holes and tie them with ropes. This is the name of the unique binding form of the Sanskrit palm leaf scriptures introduced from the Western Regions and India in ancient my country. 2.4 Sutra binding sutra binding
After gluing the leaves in order, fold them repeatedly left and right according to a certain size, and then paste the front and back covers. This binding originated from the folding of Buddhist scriptures, so it is called sutra binding.
2.5 Butterfly binding butterfly binding
Fold the written and printed leaves with words on them, with the folded edges facing right to form the book spine, and then glue the folded edges together leaf by leaf, and then wrap the book spine with a book cover. When flipping through the pages, the center of the page is centered, and the leaves are shaped like butterfly wings, hence the name. 2.6 Wrapped-back binding Fold the written or printed book leaf with the side without words, with the folded edge facing left and the remaining edge facing right to form the book spine. Then punch holes, bind the book leaf with paper twist, and then wrap the book back with a book cover. 2.7 Thread-stitching
Fold the written or printed book leaf with the side without words, with the folded edge facing left and the remaining edge facing right to form the book spine, add a book cover, and then bind the book leaf and the book cover with thread, with the stitching exposed. 2.8 Rough/edged binding
Binding the book leaf with the book cover with paper twist, leaving the rough edges at the top, bottom and back of the book natural. 2.9 Page
A single written or printed paper leaf arranged in the order of the manuscript. 2.10 Page engraving A rectangular frame into which pages engraving The fence on the four sides of the front of the book leaf, generally refers to printed books. 2.11 middle of page
The middle of the folded leaf, used as the standard strip of lines when folding the leaf. The book block of a woodblock printed book usually has the title, volume, leaf number, and sometimes the total number of words in one edition, the publishing organization, and the surname of the engraver. 2.12 word
Words written or printed on the leaves of a book with ink, printing ink, or color. 3
2.13 ink diffusion
The ink spills out of the words after it meets water or under the action of external force. 2.14 pigmentation or dyeing stained the original area after it meets water.
2.15 fading
The color fades or becomes lighter due to the action of water and light. 2.16 upside of the page layout The excess space above the picture or frame.
2.17 Underside of the page layout The remaining space below the image or frame.
2.18 Title page
GB/T21712—2008
Located after the cover and before all the leaves. It is often engraved with the title, author, time and place of publication, etc. 2.19 The page under book cover for protecting first page is also called the secondary leaf, which is used to connect the book cover and protect the first leaf. 2.20 Book block
Refers to the book inside the book cover or the book bound together before the book cover is applied. 2.21 Book head
The cut at the top of the book.
2.22 Book feet
The cut at the bottom of the book, also called the root of the book.
2.23Bookmouth
The opening opposite to the back of the book where the leaves can be turned over for reading. 2.24Bookbrain
The part to the right of the binding thread of the book core.
2.25Bookback
Also called the spine. Opposite to the mouth of the book, the part separating or connecting the upper and lower covers, equivalent to the thickness of the book. 2.26Bookeye
The hole that runs through all the leaves of the book for threading. 2.27Bookcorner
The right end of the top and the foot of the book.
2.28Bookcover
Commonly known as the book cover, also called the cover.
2.29Bookmark
A label usually attached to the upper left of the front of the book cover or book cover to write the title of the book. 2.30 Sequence bookmark
A label on the right side of a bookmark that indicates the order of a book or a sub-book in the whole book. 2.31 Paper for repair
Paper for repairing books.
3 Process flow
3.1 Deacidification
The pH value of the book leaves after deacidification with alkaline substances should be between 7.5-10. 3.2 Repairing book leaves
The repair paper should be similar in texture, thickness and color to the book leaves. 4
3.3 Slip
GB/T21712—2008
Repair the book edges with a thin paper thickness of 0.02-0.04mm cut into 1-1.5cm wide strips. Do not use paper containing wood pulp when slipping to avoid wavy shapes on the book edges. 3.4 Support
That is, to stick a sticker on the back of the whole book leaf for reinforcement. It is generally used for book leaves with very poor paper strength, aging and decay. If only part of the paper strength is lost, it should be partially supported for reinforcement.
Paste and reinforce the back of the book leaf that has been supported. It is only used to reinforce the book cover and mount the album. 3.6 Mechanical book repair
When using a pulp book repair machine, pay attention to the control of the amount of pulp to prevent the use of too much pulp and the situation that the pulp is thicker than the book leaf. 3.7 Water spraying and flattening
Spray water on the back according to the repair situation of the book leaf. The amount of water can be appropriately increased for the book leaf with more patches. Pay attention to laying the book leaf on the absorbent paper in order, be sure to flatten it, then cover it with absorbent paper and cardboard, and flatten it with a heavy object. 3.8 Single leaf lining
The area of the lining paper is half of the book leaf, just placed in the middle of the folded book leaf. 3.9 Double-leaf lining
The area of the lining paper is the same as that of the book leaf. After folding in half, it is placed in the middle of the folded book leaf. 3.10 Offset lining
It is used for books with thicker book edges after the slip edge. The height of the lining paper is the same as that of the book leaf, and the length is the horizontal length of the book leaf minus 0.5cm. It is folded in half according to the size of the book leaf and placed in the middle of the folded book leaf. The folded edge of the lining paper is aligned with the back of the book, and the staggered end of the paper edge should be close to the middle seam of the book leaf. 3.11 Book head connection
Commonly known as back connection, that is, the lining paper is wider than the book leaf. After folding in half, it is clamped into the book leaf, and then the remaining part is folded back to touch the edge of the book leaf. Note that the extended part of the lining paper should be basically consistent with the thickness of the book. 3.12. Ancient lining
Commonly known as wearing a robe cover, gold inlaid with jade. Use a white, wider lining paper to line the middle of the folded book leaf, and fold the part beyond the top, bottom and back of the book leaf back to the same level as the book leaf to make the thickness uniform, and then use a paper gun to staple the lining paper and the book leaf together. Note that the extended part of the lining paper should be basically consistent with the thickness of the book.
3.13 Lining
This method is suitable for ancient books with extremely narrow book heads that cannot be completely solved by the gold inlaid jade method. That is, stick a rice paper strip with a width of 3 to 5 cm around the book leaf, lengthen and widen the book leaf, and then put the lining paper on it. When operating, pay attention to controlling the width of the bonding to about 1mm. 3.14 Digging lining
It is used for binding small rubbings or letters of different specifications. Flatten the rubbing or letter and stick it in the middle of the book leaf made of rice paper, add lining paper, and then dig out the part of the lining paper pressed by the document. During the operation, pay attention to the thickness of the backing paper and the thickness of the document glued to the book leaf. 3.15 Folding the leaf
Fold the leaf in half. The folded leaf is usually called a tube leaf. The side with words on the butterfly-bound book leaf is folded in half, and the side without words on the back-bound and thread-bound book leaf is folded in half. The folded book leaf is folded evenly on the left and right. 3.16 Trimming
Use scissors to cut off the excess patching paper around the leaf along the edge of the leaf and trim the four sides of the leaf. Be careful not to cut the leaf. 3.17 Hammering
Use an iron hammer with a top edge length of 3 to 4 cm and a height of 5 to 6 cm to gently hammer the repaired part of the leaf to hammer the leaf flat. Use light force when hammering the book and let it fall steadily. Be careful not to hammer the leaf. 3.18 Aligning the column
Applicable to books with broken book feet and books repaired using the gold-inlaid jade method, that is, align the column line below the book edge. 5
3.19 Align the bottom
Applicable to books with limited damage to the book foot, that is, align the bottom of the book leaf. 3.20 Flattening
GB/T21712—2008
Use a book core flattening machine to squeeze out the air in the book leaf and compact it. Note that the book core should be flat when placed in the flattening machine to prevent the book core from being pressed crooked due to uneven pressure.
3.21 Paper stapler
Drill holes at 1/3 of the book head near the back of the book, insert the paper stapler, and fix all the book leaves together. The thickness of the paper twist should be similar to that of the awl used for drilling holes.
3.22 Wrap the book corners
Wrap the two book corners above and below the back of the book with silk fabric. Ancient books that are repaired using the backing paper and gold inlaid jade methods generally need to be wrapped with silk fabric (preferably silk) to wrap the book corners.
3.23 Buckle
The length and width of the book cover are about 3.0cm beyond the book core, and the excess part is folded back to align with the book core. This method is widely used and can be used for butterfly binding, back binding, and thread-bound ancient books.
3.24 Upper
One side of the book cover is folded back to align with the book edge, and the other three sides are cut or trimmed to align with the book core. This method is mostly used for thread-bound and wool-bound books. 3.25 Tube
The book cover has the same specifications as the book leaves, and is bound with the book leaves at the same time after being folded in half. This method is mostly used for thread-bound and wool-bound books. 3.26 Back binding
The length of the book cover is twice the width of the book core plus the height of the book back plus 3.0cm, and the width of the book cover is the length of the book core plus 3.0cm. The book cover is pasted to the book back in the middle, and the excess part is folded back to align with the book core. This method is mostly used for butterfly binding and back binding books. 3.27 Punching book eyes
There are two types of book eyes: the eye for paper punching and the eye for binding. When binding, the original book eyes should be used as much as possible. Only when the original book eyes are really unusable can new book eyes be punched. Use an awl to punch holes at the appropriate position on the right side of the book cover. 3.28 Binding
It is only used for thread-bound books. Use a needle to guide the silk thread through the book eyes in sequence to connect the book cover and the book core. It is best to choose pure silk thread. 3.29 Labeling
Paste the repaired book title label and label label at the appropriate position of the book cover. 4 Process requirements
4.1 Book leaf repair
The leaf surface is flat, the column line is straight, and there is no dead fold. The repaired area is not shrunk or wrinkled, and is flat and clean. 4.2 Handwriting
The handwriting is complete, without ink running or fading.
4.3 Folding
The position is accurate and the fold is straight.
4.4Paper patching
Paper patching should be similar in color, texture, thickness and pattern to the book leaves. The edges must have stubble. The adhesion between the paper patching and the book leaves should be controlled below 2.0mm. 4.5Treatment of moldy and aged book leaves
Book leaves with moldy area ≤60% and strength loss ≤80% are generally only repaired and cannot be mounted. 4.6Paper pulp repair
Book leaves repaired with paper pulp should be properly applied and tightly combined with the book leaves. The front of the book leaves should be clean and no excess paper pulp should remain. 4.7Both ends
Both ends should be neat (except for rough binding). 4.8Book edge and book back
Book edge and book back should be flat and straight, with consistent thickness. The allowable error is ±2.0mm. 4.9Corner wrapping
Corner wrapping is tight, edges are vertical, not loose, not wrinkled, and flat. 4.10 Book cover
GB/T21712—2008
The book cover is smooth, without wrinkles, glue marks, or nail scratches. The book core is tightly covered on all sides, with no white edges. The error is ±0.1mm. 4.11 Book eye position
The book eye position and distance are appropriate. After the stitching, the line segments are connected together to form a straight line without skew. The error is ±1.0mm. The two strands of wire are not entangled with each other, and no thread ends are exposed.
4.12 Book edge
When the book is laid flat, the book edge is at a 90° right angle, without skew or slant. The vertical stacking error of the book leaf fold is ±0.1mm. If there is lining paper, the fold (or edge) is close to the book edge.
4.13 Leaf number
No inverted leaves, and the page number sequence is correct.
4.14 Column lines
The column lines at the book edge are uniform (or even at the bottom). 4.15 Paper grabs
The paper twist is of appropriate thickness, tightness and position. 4.16 The proportion of gold and jade inlays
The sum of the lengths of the inlaid parts of the backing paper outside the ends of the book leaves should not exceed one-fifth of the original book, and the ratio of the top and bottom is 3:2. 5 Inspection
5.1 Inspection conditions
Indoors, room temperature 22°C, ±2°C, relative humidity 55%, ±5%, natural light or lighting conditions. 5.2 Inspection form
Inspect each book and each leaf.
5.3 Inspection tools
Ruler, square ruler.
5.4 Inspection method
5.4.1 Visual inspection
Confirm that the book meets the quality standards of restoration through direct observation. 5.4.2 Expert Appraisal Method
If there are serious problems with the quality of the repair, the quality level must be determined by professionals with senior professional titles. 6 Quality Level
6.1 Excellent
If the requirements of Chapter 4 are fully met, the repair quality is excellent. 6.2 Good
If more than 80% of the repair indicators meet the requirements of Chapter 4, the repair quality is good. 6.3 Qualified
If more than 60% of the repair indicators meet the requirements of Chapter 4, the repair quality is qualified. 6.4 Unqualified
If more than 40% of the repair indicators do not meet the requirements of Chapter 4, the repair quality is unqualified GB/T
21712200820 Flattening
GB/T21712—2008
Use a book core flattening machine to squeeze out the air in the book leaves and compact them. Note that the book core should be flat when placed in the flattening machine to prevent the book core from being distorted due to uneven pressure.
3.21 Binding paper gun
Drill holes at 1/3 of the book head near the back of the book, insert the paper gun, and fix all the book leaves together. The thickness of the paper twist should be similar to that of the awl used for drilling holes.
3.22 Wrap the book corners
Wrap the two book corners above and below the back of the book with silk fabric. Ancient books that are repaired using the backing paper and gold-inlaid jade methods generally need to be wrapped with silk fabric (preferably silk) to wrap the book corners.
3.23 Buckle cover
The length and width of the book cover should exceed the book core by about 3.0cm, and the excess part should be folded back to align with the book core. This method is widely used, and can be used for butterfly binding, back binding, and thread-bound ancient books.
3.24 Upper cover
One side of the book cover is folded back to align with the book edge, and the other three sides are trimmed or cut to align with the book core. This method is mostly used for thread-bound and wool-bound books. 3.25 Tubular cover
The book cover has the same specifications as the leaves, and is bound with the leaves at the same time after being folded in half. This method is mostly used for thread-bound and wool-bound books. 3.26 Back cover
The length of the book cover is twice the width of the book core plus the height of the book back plus 3.0cm, and the width of the book cover is the length of the book core plus 3.0cm. The book cover is pasted to the book back in the middle, and the excess part is folded back to align with the book core. This method is mostly used for butterfly binding and back-bound books. 3.27 Book eyes
It is divided into paper eyes and thread eyes. When binding, the original book eyes should be used as much as possible. The original eyelets can no longer be used before you can make new ones. Use an awl to make holes in the right position of the book cover. 3.28 Binding
Only for thread-bound books. Use a needle to guide the silk thread through the eyelets in turn to connect the book cover and the book core. It is best to choose pure silk thread. 3.29 Labeling
Paste the repaired book title label and sequence label in the appropriate position of the book cover. 4 Process requirements
4.1 Book leaf repair
The leaf surface is flat, the column line is straight, and there is no dead fold. The repaired area is not shrunk or wrinkled, but flat and clean. 4.2 Handwriting
The handwriting is complete, without ink running or fading.
4.3 Folding
The position is accurate and the fold is straight.
4.4Paper patching
Paper patching should be similar in color, texture, thickness and pattern to the book leaves. The edges must have stubble. The adhesion between the paper patching and the book leaves should be controlled below 2.0mm. 4.5Treatment of moldy and aged book leaves
Book leaves with moldy area ≤60% and strength loss ≤80% are generally only repaired and cannot be mounted. 4.6Paper pulp repair
Book leaves repaired with paper pulp should be properly applied and tightly combined with the book leaves. The front of the book leaves should be clean and no excess paper pulp should remain. 4.7Both ends
Both ends should be neat (except for rough binding). 4.8Book edge and book back
Book edge and book back should be flat and straight, with consistent thickness. The allowable error is ±2.0mm. 4.9Corner wrapping
Corner wrapping is tight, edges are vertical, not loose, not wrinkled, and flat. 4.10 Book coverWww.bzxZ.net
GB/T21712—2008
The book cover is smooth, without wrinkles, glue marks, or nail scratches. The book core is tightly covered on all sides, with no white edges. The error is ±0.1mm. 4.11 Book eye position
The book eye position and distance are appropriate. After the stitching, the line segments are connected together to form a straight line without skew. The error is ±1.0mm. The two strands of wire are not entangled with each other, and no thread ends are exposed.
4.12 Book edge
When the book is laid flat, the book edge is at a 90° right angle, without skew or slant. The vertical stacking error of the book leaf fold is ±0.1mm. If there is lining paper, the fold (or edge) is close to the book edge.
4.13 Leaf number
No inverted leaves, and the page number sequence is correct.
4.14 Column lines
The column lines at the book edge are uniform (or even at the bottom). 4.15 Paper grabs
The paper twist is of appropriate thickness, tightness and position. 4.16 The proportion of gold and jade inlays
The sum of the lengths of the inlaid parts of the backing paper outside the ends of the book leaves should not exceed one-fifth of the original book, and the ratio of the top and bottom is 3:2. 5 Inspection
5.1 Inspection conditions
Indoors, room temperature 22°C, ±2°C, relative humidity 55%, ±5%, natural light or lighting conditions. 5.2 Inspection form
Inspect each book and each leaf.
5.3 Inspection tools
Ruler, square ruler.
5.4 Inspection method
5.4.1 Visual inspection
Confirm that the book meets the quality standards of restoration through direct observation. 5.4.2 Expert Appraisal Method
If there are serious problems with the quality of the repair, the quality level must be determined by professionals with senior professional titles. 6 Quality Level
6.1 Excellent
If the requirements of Chapter 4 are fully met, the repair quality is excellent. 6.2 Good
If more than 80% of the repair indicators meet the requirements of Chapter 4, the repair quality is good. 6.3 Qualified
If more than 60% of the repair indicators meet the requirements of Chapter 4, the repair quality is qualified. 6.4 Unqualified
If more than 40% of the repair indicators do not meet the requirements of Chapter 4, the repair quality is unqualified GB/T
21712200820 Flattening
GB/T21712—2008
Use a book core flattening machine to squeeze out the air in the book leaves and compact them. Note that the book core should be flat when placed in the flattening machine to prevent the book core from being distorted due to uneven pressure.
3.21 Binding paper gun
Drill holes at 1/3 of the book head near the back of the book, insert the paper gun, and fix all the book leaves together. The thickness of the paper twist should be similar to that of the awl used for drilling holes.
3.22 Wrap the book corners
Wrap the two book corners above and below the back of the book with silk fabric. Ancient books that are repaired using the backing paper and gold-inlaid jade methods generally need to be wrapped with silk fabric (preferably silk) to wrap the book corners.
3.23 Buckle cover
The length and width of the book cover should exceed the book core by about 3.0cm, and the excess part should be folded back to align with the book core. This method is widely used, and can be used for butterfly binding, back binding, and thread-bound ancient books.
3.24 Upper cover
One side of the book cover is folded back to align with the book edge, and the other three sides are trimmed or cut to align with the book core. This method is mostly used for thread-bound and wool-bound books. 3.25 Tubular cover
The book cover has the same specifications as the leaves, and is bound with the leaves at the same time after being folded in half. This method is mostly used for thread-bound and wool-bound books. 3.26 Back cover
The length of the book cover is twice the width of the book core plus the height of the book back plus 3.0cm, and the width of the book cover is the length of the book core plus 3.0cm. The book cover is pasted to the book back in the middle, and the excess part is folded back to align with the book core. This method is mostly used for butterfly binding and back-bound books. 3.27 Book eyes
It is divided into paper eyes and thread eyes. When binding, the original book eyes should be used as much as possible. The original eyelets can no longer be used before you can make new ones. Use an awl to make holes in the right position of the book cover. 3.28 Binding
Only for thread-bound books. Use a needle to guide the silk thread through the eyelets in turn to connect the book cover and the book core. It is best to choose pure silk thread. 3.29 Labeling
Paste the repaired book title label and sequence label in the appropriate position of the book cover. 4 Process requirements
4.1 Book leaf repair
The leaf surface is flat, the column line is straight, and there is no dead fold. The repaired area is not shrunk or wrinkled, but flat and clean. 4.2 Handwriting
The handwriting is complete, without ink running or fading.
4.3 Folding
The position is accurate and the fold is straight.
4.4Paper patching
Paper patching should be similar in color, texture, thickness and pattern to the book leaves. The edges must have stubble. The adhesion between the paper patching and the book leaves should be controlled below 2.0mm. 4.5Treatment of moldy and aged book leaves
Book leaves with moldy area ≤60% and strength loss ≤80% are generally only repaired and cannot be mounted. 4.6Paper pulp repair
Book leaves repaired with paper pulp should be properly applied and tightly combined with the book leaves. The front of the book leaves should be clean and no excess paper pulp should remain. 4.7Both ends
Both ends should be neat (except for rough binding). 4.8Book edge and book back
Book edge and book back should be flat and straight, with consistent thickness. The allowable error is ±2.0mm. 4.9Corner wrapping
Corner wrapping is tight, edges are vertical, not loose, not wrinkled, and flat. 4.10 Book cover
GB/T21712—2008
The book cover is smooth, without wrinkles, glue marks, or nail scratches. The book core is tightly covered on all sides, with no white edges. The error is ±0.1mm. 4.11 Book eye position
The book eye position and distance are appropriate. After the stitching, the line segments are connected together to form a straight line without skew. The error is ±1.0mm. The two strands of wire are not entangled with each other, and no thread ends are exposed.
4.12 Book edge
When the book is laid flat, the book edge is at a 90° right angle, without skew or slant. The vertical stacking error of the book leaf fold is ±0.1mm. If there is lining paper, the fold (or edge) is close to the book edge.
4.13 Leaf number
No inverted leaves, and the page number sequence is correct.
4.14 Column lines
The column lines at the book edge are uniform (or even at the bottom). 4.15 Paper grabs
The paper twist is of appropriate thickness, tightness and position. 4.16 The proportion of gold and jade inlays
The sum of the lengths of the inlaid parts of the backing paper outside the ends of the book leaves should not exceed one-fifth of the original book, and the ratio of the top and bottom is 3:2. 5 Inspection
5.1 Inspection conditions
Indoors, room temperature 22°C, ±2°C, relative humidity 55%, ±5%, natural light or lighting conditions. 5.2 Inspection form
Inspect each book and each leaf.
5.3 Inspection tools
Ruler, square ruler.
5.4 Inspection method
5.4.1 Visual inspection
Confirm that the book meets the quality standards of restoration through direct observation. 5.4.2 Expert Appraisal Method
If there are serious problems with the quality of the repair, the quality level must be determined by professionals with senior professional titles. 6 Quality Level
6.1 Excellent
If the requirements of Chapter 4 are fully met, the repair quality is excellent. 6.2 Good
If more than 80% of the repair indicators meet the requirements of Chapter 4, the repair quality is good. 6.3 Qualified
If more than 60% of the repair indicators meet the requirements of Chapter 4, the repair quality is qualified. 6.4 Unqualified
If more than 40% of the repair indicators do not meet the requirements of Chapter 4, the repair quality is unqualified GB/T
21712200813 Leaf code
No reversed leaves, the page number sequence is correct.
4.14 Column lines
The column lines at the book edge are uniform (or even at the bottom). 4.15 Paper grab
The paper twist is of appropriate thickness, tightness and position. 4.16 The proportion of gold and jade inlays
The sum of the lengths of the inlaid parts of the backing paper outside the ends of the book leaves should not exceed one-fifth of the original book, and the ratio of the top and bottom is 3:2. 5 Inspection
5.1 Inspection conditions
Indoors, room temperature 22°C, ±2°C, relative humidity 55%, ±5%, natural light or lighting conditions. 5.2 Inspection form
Inspect each book and each leaf.
5.3 Inspection tools
Ruler, square ruler.
5.4 Inspection method
5.4.1 Visual inspection method
Through direct observation, confirm that all aspects of the book meet the restoration quality standards after restoration. 5.4.2 Expert appraisal method
If there are serious problems with the restoration quality, the quality level must be determined by professionals with senior professional titles. 6 Quality level
6.1 Excellent
If the requirements of Chapter 4 are fully met, the restoration quality is excellent. 6.2 Good
If more than 80% of the restoration indicators meet the requirements of Chapter 4, the restoration quality is good. 6.3 Qualified
If more than 60% of the restoration indicators meet the requirements of Chapter 4, the restoration quality is qualified. 6.4 Unqualified
If more than 40% of the restoration indicators do not meet the requirements of Chapter 4, the restoration quality is unqualified GB/T
21712200813 Leaf code
No reversed leaves, the page number sequence is correct.
4.14 Column lines
The column lines at the book edge are uniform (or even at the bottom). 4.15 Paper grab
The paper twist is of appropriate thickness, tightness and position. 4.16 The proportion of gold and jade inlays
The sum of the lengths of the inlaid parts of the backing paper outside the ends of the book leaves should not exceed one-fifth of the original book, and the ratio of the top and bottom is 3:2. 5 Inspection
5.1 Inspection conditions
Indoors, room temperature 22°C, ±2°C, relative humidity 55%, ±5%, natural light or lighting conditions. 5.2 Inspection form
Inspect each book and each leaf.
5.3 Inspection tools
Ruler, square ruler.
5.4 Inspection method
5.4.1 Visual inspection method
Through direct observation, confirm that all aspects of the book meet the restoration quality standards after restoration. 5.4.2 Expert appraisal method
If there are serious problems with the restoration quality, the quality level must be determined by professionals with senior professional titles. 6 Quality level
6.1 Excellent
If the requirements of Chapter 4 are fully met, the restoration quality is excellent. 6.2 Good
If more than 80% of the restoration indicators meet the requirements of Chapter 4, the restoration quality is good. 6.3 Qualified
If more than 60% of the restoration indicators meet the requirements of Chapter 4, the restoration quality is qualified. 6.4 Unqualified
If more than 40% of the restoration indicators do not meet the requirements of Chapter 4, the restoration quality is unqualified GB/T
217122008
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