Printing plate-making photosensitive emulsion has quality requirements? Which subjects are tested?

Abstract: 本文介绍了GB/T 21894—2008标准对纺织圆网印花制版双组分感光乳液的质量要求。检测项目包括：不挥发物含量需在25%~32%范围内；pH值需在4.0~6.5之间；粒径应≤3μm；离心稳定性要求沉积物高度≤1mm；黏度需在500MPa*s~1000MPa*s范围内；曝光能量应在50mj/cm²~100mj/cm²范围内；分辨率需≤200μm。乳液膜的耐化学药品浸泡性要求在丙酮、5%NaOH、5%H2SO4水溶液中的浸泡后损失≤5%。

GB/T 21894-2008 is applicable to the product quality control of two-component photosensitive emulsion for textile rotary screen printing plate making for textile printing. Today we will introduce the provisions of this standard on photosensitive emulsion for printing and plate making.

Item detection

1. Non-volatile matter: the sample must be in the range of 25%~32% to be considered up to standard.

2. PH value: The sample must be in the range of 4.0~6.5 to be considered up to standard.

3. Particle size: If the sample needs to be ≤3μm, it is regarded as up to standard.

4. Centrifugal stability: If the height of the sample sediment is ≤1mm, it is regarded as up to standard.

5. Viscosity: Tested at 23°C, if the viscosity of the sample is within the range of 500MPa*s~1000MPa*s, it is considered up to the standard.

6. Exposure energy: The sample must be in the range of 50mj/cm²~100mj/cm² to be considered up to standard.

7. Resolution: If the sample needs to be ≤200μm, it is considered to be up to standard.

8. Chemical immersion resistance of emulsion film:

Soaked in acetone solution, if the sample ≤ 5%, it is considered up to standard.

Soaked in 5% NaOH aqueous solution, if the sample is ≤5%, it is regarded as up to standard.

Soaked in 5% H2SO4 aqueous solution, if the sample is less than or equal to 5%, it is regarded as up to standard.

Are there quality requirements for photosensitive emulsion for printing and plate making? Which subjects are tested? Picture 1

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