GB/T 21894-2008A kind of photosensitive emulsion for plate making on fabric rotary screen printing (English PDF)

1 Scope

This standard specifies the product requirements, sampling, test methods, inspection rules for textile rotary screen printing plate-making photosensitive emulsion, marking, labeling, package

Loading, transport and storage.

This standard applies to product quality control textile printing textile rotary screen printing plate with a two-component photosensitive emulsion.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent

Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research

Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.

GB/T 191 Packaging - Pictorial signs (GB/T 191-2008, ISO 780.1997, MOD)

Representation GB/T 1250-1989 and method of determining the limit values

GB/T 3186-2006 Paints, varnishes and raw materials for paints and varnishes - Sampling (ISO 15528.2000, IDT)

GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD)

GB/T 8325-1987 polymers and copolymers of aqueous dispersions pH value measurement method (eqv ISO 1148. 1980)

GB/T 11175-2002 Test method for the synthetic resin emulsion

3 Requirements

Textile rotary screen printing plate photographic emulsion product performance indicators in line with the requirements of Table 1.

Table 1 quality textile rotary screen printing plate-making photosensitive emulsion requirements

Item Index

1. Non-volatile matter (mass fraction)/25 to 32%

2. pH value of 4.0 to 6.5

3. Particle size/µm <= 3

4. Centrifugal stability (sediment height)/mm <= 1

5. Viscosity (23 °C)/(mPa · s) 500 ~ 1000

6. Exposure Energy/(mJ/cm2) 50 ~ 100

7. Resolution/µm <= 200

8. Immersing emulsion membrane resistance to chemicals (mass fraction) /%

Acetone <= 5

5% (mass fraction) NaOH solution <= 5

5% (mass fraction) H2SO4 solution <= 5

NOTE. Test the above photosensitive emulsion performance indicators 6,7,8 item is added for rotary screen photosensitizer emulsion test, not against other items to add

Test emulsion plus photosensitizer.

4 Sampling

Lot for the sampling, blending plant with a uniform product batch. Press each batch GB/T 3186-2006 specified sampling. The

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