This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of lithographic printing inks. This standard applies to tinplate and aluminum plate printing inks for single-color and multi-color offset printing presses. QB/T 2025-1994 Lithographic printing inks QB/T2025-1994 Standard download decompression password: www.bzxz.net
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of lithographic printing inks. This standard applies to tinplate and aluminum plate printing inks for single-color and multi-color offset printing presses.

Light Industry Industry Standard of the People's Republic of China
Lithographic Printing Ink
Subject Content and Scope of Application
QB/T 2025
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of lithographic printing ink. This standard is applicable to printing ink for printing tinplate and aluminum plates on single-color and multi-color offset printing presses. 2 Reference standards
GB250 Grey scale for evaluating discoloration
GB/T 1732 Determination of impact strength of paint film
GB3186 Sampling of coating products
GB/T14624.1 Test method for ink color
GB/T14624.2 Test method for ink color strength
GB/T14624.3 Test method for ink fluidity GB/T14624.5 Test method for ink viscosity
QB559 Test method for ink fineness
ZBA 17005 Classification, naming and model of printing ink products 3 Product classification
According to product color, it is divided into 5 categories: white, yellow, blue, red and black. 4 Technical requirements
All technical indicators and performance requirements of products must comply with the provisions of Table 1 and Table 2. Table i
P05101
P05231
P05421
P05641
P05801
Product Name
White Amount of Lithographic Iron
Medium Yellow Ink of Lithographic Iron
Sky Blue Ink of Lithographic Iron
Approximate Standard Sample
Deep Red Ink of Lithographic Iron
Black Amount of Lithographic Iron
Approved by China Light Industry Association on 1994-10-26
Cooking Color Strength, %
95～110
Fineness ,μm
Flowability, mm
1995-06-01 implementation
p05101
P05231
P05421
P05641
P05801
5 Test method
The most common name
Lithographic iron white stack
Lithographic iron middle yellow building
Lithographic iron sky blue
Lithographic iron deep red device
Lithographic iron black ink
The color shall be implemented in accordance with GB/T14624.1.
QB/T 2025-1994
The tinting strength shall be implemented in accordance with GB/T14624.2. 5.3
Fineness shall be in accordance with QB559.
5.4Flowability shall be in accordance with GB/T14624.3. 5.5Precision shall be in accordance with GB/T14624.5. 5.6Impact strength shall be in accordance with GB/T1732. 5.7Testing methods for dryness and heat resistance and sample preparation 5.7.1Testing principle
Dryness, min
Impact strength,
Heat avoidance, grade
Cooking, grade
After the ink is baked at high temperature in a unit time, observe whether the ink film is dry and the color change, which is called the dryness and heat resistance of the ink.
Instruments and tools
5.7.2.1Circle adjustment knife.
5.7.2.2 Tinplate 190mmX190mmX0.2mm5.7.2.3 Rubber roller: 530mm, length L100mm. 5.7.2.4 Automatic overflow box: 0~200℃, sensitivity ±2℃5.7.2.5 Pipette: 0.1ml.
5.7.3 Test conditions
The test should be carried out in a constant overflow box at 150℃±5℃ (white ink 180℃±5℃). 5.7.4 Test steps
5.7.4.1 Take 0.2mL of the test sample with an ink pipette, place it on a glass plate, beat it evenly with a rubber pry, and then apply it evenly on the tinplate repeatedly (prepare several pieces at the same time).
5.7.4.2 Place the three samples in a constant temperature oven at 150℃±5℃ (white ink 180℃±5℃) and bake for 15 minutes. Take out two samples. After cooling, if they are not sticky when touched by hand, it is the dryness test result and used as the standard sample. 5.7.4.3 Take out one sample at 30 minutes and compare the color change with the standard sample. 5.7.4.4 Heat resistance evaluation standard: Level 5
Alternating with the standard color sample, Level 4
Severe color change.
5.8 Boiling resistance test method
5.8.1 Test principle
Slight color change, Level 3 Light color change: Level 2 Test to determine whether the boiling resistance of the ink is suitable for the trademark printing of food cans. 5.8.2 Instruments and tools
5.8.2.1 High-pressure steam sterilizer.
Discoloration is heavier 1
5.8.2.2 Timing clock.
5.8.2.3 Scissors. bZxz.net
5.8.3 Inspection conditions
QB/T2025 --- 1994
The inspection should be carried out in a high pressure steam sterilizer with a pressure of 9.8×10Pa and a temperature of 121°C. 5.8.4 Take the sample prepared in 5.7.4, cut it into two strips of 100mm×20mm, and bend it into two 90° angles on the front and back. 5.8.5 Put the sample into the high pressure steam sterilizer, steam it at 9.8×10*P# and 121°C for 30n, take it out and cool it to room temperature, compare it with the gray sample card for evaluating discoloration, and divide it into 1-5 grades. 5.8.6 The grading inspection standard shall be implemented in accordance with the provisions of GB250. 6 Inspection rules
6.1 Product batch: The unit product completed by a single machine or unit at one time is a batch. 6.2 The product shall be sampled according to the method of GB3186. The sample shall be divided into two parts, one of which shall be sealed for reference and the other shall be used as a sample for inspection. 6.3 Judgment of unqualified batches: Each batch of products shall be sampled and inspected according to GB3186. If one or more technical indicators are unqualified, the batch of products shall be unqualified.
6.4 The product shall be inspected by the inspection department of the manufacturer in accordance with the provisions of this standard, and it shall be ensured that all products leaving the factory shall meet the technical indicators of this standard; the product shall have a certificate of conformity, and instructions for use or precautions shall be attached when necessary. 6.5 The receiving unit has the right to inspect the product in accordance with the provisions of this standard. If it is found that the product quality does not meet the provisions of this standard, the supply and demand parties shall jointly re-sample and inspect according to GB3186; if it still does not meet the technical indicators of this standard, the batch of products shall be unqualified and the receiving unit shall have the right to return the products.
6.6 Both the supplier and the buyer shall check and verify the product packaging and quantity. If the packaging is leaking or the quantity is out of stock, the relevant departments shall be notified in time.
6.7 When there is a dispute between the supplier and the buyer over product quality, the product quality supervision and inspection agency shall perform arbitration inspection. 6.8 Inspection classification
6.8.1 The four quality indicators of color, tinting strength, fineness and fluidity are the factory inspection items. 6.8.2 The five performance requirements of viscosity, dryness, impact strength, heat resistance and boiling resistance are the type inspection items. Type inspection shall be carried out in the following cases.
Trial determination and identification of new products or old products transferred to the factory for production; when there are major changes in structure, materials and processes that may affect product performance: after normal production, the type inspection cycle is three months, c.
d, long-term suspension of production, when resuming production.
7 Marking, packaging, transportation, storage
7.1 Lithographic iron oil is packed in iron boxes and iron barrels, and then packed in outer packaging boxes. 7.2 The iron boxes, iron barrels and outer packaging should be labeled with the manufacturer's name, address, product name, model, standard number, quantity, batch number, manufacturing date and the "Do not invert" mark.
7.3 This product can be transported by vehicles, airplanes and other means of transportation under the packaging conditions in accordance with Article 7.1. 7.4 During transportation and loading and unloading, it must not be thrown, dropped or collided to prevent the packaging from breaking and ink from spilling. 7.5 The product must not be stored in the open air, and the warehouse must be dry, ventilated and prevented from moisture. 7.6 This product is valid for two years from the date of manufacture. 90
Additional instructions:
QB/T2025--1994
This standard is proposed by the Quality Standards Department of China Light Industry Association. This standard is under the jurisdiction of the National Ink Standardization Center. This standard was drafted by Fuzhou Ink Factory and Shanghai Ink Factory. The main drafters of this standard are Chen Shizhan and Wang Weide.
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