Foamed textile printing inks

Foamed textile printing inks

What are the points to note when producing foamed textile printing inks ?



Binders suitable for physically drying printing inks include cellulose nitrate and the cellulose esters of organic acids, as well as polymers and copolymers of acrylic acid esters, vinyl chloride, vinylidene chloride and acrylonitrile. Polyamides and polyesters are also often used for this purpose.

Also suitable are oxidatively drying product based on unsaturated fatty acids combined with hard resins such as rosin, phenolic and ketone resins. Two-pack systems which can be cured with polyisocyanates can also be used for such printing ink formulations.

If the inks are to be used in letterpress printing as prefoamed systems, certain additional measures are necessary. The

printing ink

, whose, volume increases by 50 - 80% during the process, is mixed with air whilst being subjected to high shear forces. Here, foam density is governed by the mixing speed, air pressure and ink throughput. The resultant foamed ink can then immediately be passed to the printing machine.

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Blog, Updated at: 11:03 PM
 
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