Pure photopolymer liquid emulsion can be somewhat of a double-edged sword. On the one hand it offers some really great advantages, but on the other hand also present some niggly headaches. If you want a brief run-down on the pros and cons of pure photopolymer liquid emulsion, simply watch the video presented by industry expert and master screen printer Douglas Grigar.
Pure Photopolymer Liquid Emulsion: The Positives
- These emulsions are ready to use straight from the pot. No mixing in of diazo sensitisers required.
- If you are using an entry level UV screen exposure unit where your exposure times are generally quite long, a pure photopolymer emulsion will offer you a much reduced exposure time.
- Very fast exposure times compared to diazo emulsions in general.
- Our pure photopolymer liquid emulsion, Procol Exp CEP, is very high in solids and therefore flows well and covers the mesh easily. This may vary between brands of pure photopolymer liquid emulsion.
- High viscosity due to high solids content means easier application and less potential for mess.
- Perfect if you need high EOM for high density printing or other applications where a thick stencil is essential.
- Great for general artwork applications where detail levels are not too fine.
- Procol Exp CEP offers a good level of water resistance, so is suitable for use with waterbased inks.
- Procol Exp CEP pure photopolymer emulsion offers excellent resistance to solvent based inks, which means you can keep less stock.
Pure Photopolymer Liquid Emulsion: The Negatives
The more “rubbery” nature of all pure photopolymer emulsions means that with the benefits mentioned above, comes the downside of screens being harder to reclaim. If you are creating a high-build stencil, we suggest a reclaiming procedure that is a little different to normal as well…
Place the screen in a horizontal position, squeegee side facing up. Apply a generous amount of emulsion remover and allow to work for several minutes, taking care NOT to allow the product to dry on the screen. If it dries you will not be able to reclaim the screen at all.
Peel the stencil from the opposite side and then proceed to reclaim in the usual way. A non-drip stencil removing gel product could prove to be a better bet than standard pre-mixed emulsion removers.