This standard applies to pottery, stoneware, porcelain and decorative art ceramics. GB 3303-1982 Terminology of defects in daily-use ceramics GB3303-1982 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Terms used for defects of domestic ceramic ware
Terms used for defects of domestic ceramic wareThis standard applies to pottery, stoneware, porcelain and decorative art ceramic products. General terms
Flat products
Hollow products
Visible surface and
Invisible surface
Not allowed
Very inconspicuous
Inconspicuous
Not very obvious
Not serious
Not very seriousWww.bzxZ.net
Published by the National Bureau of Standards from 1982 to 11-19
Definition or meaning
Ceramic products with an inner depth of less than 25 mm
Ceramic products with an inner depth greater than or equal to 25 mm are divided into the following according to their capacity:
Large hollow products: with a capacity greater than or equal to 1100 ml.
6. Small hollow products: The inner and outer surfaces of bowls, cups, and jars with a capacity of less than 1100 ml, the outer surfaces of pots, jars, bottles, pans, pots, and pot and bowl covers, the upper surface of dishes, and the front of large sculptures, small and medium-sized fronts and backs are all called visible surfaces. The rest of the above products, that is, the parts that are not easily visible when placed according to custom, are called non-visible surfaces. Other objects shall be treated as similar products mentioned above.
The specified defects are not allowed on the products.
Defects that are almost invisible when inspected from the front at a distance of 500 mm under natural light.
Defects that are not easily visible when inspected from the front at a distance of 500 mm under natural light.
Defects that are easier to see when inspected from the front at a distance of 500 mm under natural light, but not too obvious.
Defects that are easy to see when inspected from the front at a distance of 500 mm under natural light, but not too serious.
Defects that are easily seen when inspected from the front at a distance of 500 mm under natural light, but not too serious.
UDC 666.5/.6
GB 330382
Corresponding English
Flat ware
Hollow ware.
a. Big hollow ware
b. Small hollow ware
Open surface and
hidden surface
Not allowed
Very obscure
Obs cure
Nat too obvious
Not serious
Not too serious
Implemented on 1983-08-01
2 Product defect terminology
Crooked mouth and ears
Blister edge
Bottom edge sticky residue
GB 3303-82
Definition or meaning
The shape of the product does not conform to the specified design. The mouth and ear handles are not in the right height or are crooked. The solid body with raised tumors under the glaze
The hollow bubbles under the glaze
The defects caused by the mud and glaze residues that have not been completely removed remaining on the body
The defective body
The small bubbles on the glaze surface
A series of small bubbles appearing on the edge of the mouth of the product. The water content of the body is not properly controlled before entering the kiln, causing partial peeling during firing
The glaze surface of the product cracks
It refers to the streaky defects formed by the cracking of the body and glaze. Including: a. Yin crack: refers to the cracks covered by glaze!
b. Glaze crack: refers to the glaze surface cracking while the body is not crackedC. Both body and glaze crack: refers to the cracking of both body and glaze
Hole caused by the melting of fusible materials during the firing processColored stains on the surface of the product, also known as iron spotsSmall holes on the glaze surface (or brown eyes, pig hair pores, pinholes)
The glaze surface of the product is adhered to slag particles such as chaff ash from the pressed bowl
Fine slag particles are adhered to the edge of the foot of the product
Corresponding English
Deform or warp
Distortion af handle
and spout
Body bla ating
Blister
Body refuse
Breaching of body
Glaze bubble
Small bubble at rim
Body peel off
Glaze craze
Crackle:
a,Crack under the glaze
b.Crazing
c.Crack both on body
and glaze
Fusion hole
Specks or iron spots
Pin-hole
Dropping grog
Stuck on bottom rim
Mud glaze
Improper rust
Line defects
Image defects
Glaze on the baked flower
Dirty bottom
Mouth ear joint
Head mud color difference
Plaster class
GB3303 --82
Continued Table 2
Definition or meaning
The traces of the supporting body left on the product
The defects formed by the adhesion of the broken body and foreign objects during firing The yellow-colored rough surface caused by the fly ash in the flame The local deglaze on the surface of the product, including:
a Pressed glaze: thin strips of glaze missing at the concave joint of the broken body b, Rolled (shrinked) glaze: the glaze surface is rolled and shrunk on both sides to form a glaze missing in the middle
The glaze surface is similar to orange peel
The broken body, the glaze surface is partially raised in a wisp-like phenomenon The surface of the product is partially uneven due to the thin glaze fired
The surface of the product shows the phenomenon of unnecessary mottled colors. The same pattern is unevenly light or dull due to under-firing.
Defects in lines and edges decorated with lines
Surface incompleteness and color irregularity
Colored stains and glaze damage on the product glaze during the baking process
Discoloration of the bottom due to other impurities
The color of the mud at the mouth and ear handle joints is inconsistent with the color of the product itself
The different color of the ring body due to the adhesion of gypsum. The blue phenomenon caused by the thin gold layer. Corresponding English
Pin mark
Stuck sear
Flashing
Glaze- peels:
a. colour
Banding defects
Decoration defect s
Sticking stain of
decoration-Firing
Dirty foot
Color inhomogeneous af
sticking-up slip
Plaster dirt
Purple gold
Scratches on glaze
Wave pattern
GB3303-82
Continued Table 2
Definition or meaning
Gray-black or brown on the periphery or the whole of the product Partial or complete yellowing of the product
Stripe and partial gloss loss on the glaze of the product Partial impact of the product Velvet defect (also called hard defect) Arc-shaped traces produced during rolling or knife pressing The glaze of the product is uneven and presents wavy patterns Corresponding English
Smoked
Yellowing of laze
Scrub mark on glaze
Roller mark
Ripple glaze
Additional Note:
This standard was proposed by the First Light Industry Bureau of the Ministry of Light Industry of the People's Republic of China and was drafted by the Ceramic Industry Science Research Institute of the Ministry of Light Industry. This standard was drafted by the Ceramic Industry Science Research Institute of the Ministry of Light Industry. 26
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