Emulsions Films Block Outs

Photographic Emulsion Why use an emulsion ? On 95% of work a direct emulsion can be used for a stencil. Its only when very fine halftones are needed to be produced, and on a few other specialized requirements, that an indirect film needs to be used. The emulsion stencil is far less costly than a film stencil, and can achieve as good a reproduction as a film. If used correctly (cost factor 1 to 20 in favour of the Emulsion) Different types of Emulsions There are three types of emulsions, one for textiles, or solvent based inks, also emulsions that will handle both. And also two different types of sensitizers for the above. One being Diazo and the other Bichromate. As printers have a preference for one or the other, we carry a large range as follows; FOR WATER BASED INKS; Kiwocol 225 Diazo sensitized, easy to strip from the screen, extremely high water resistance. Sold per 1lt, 3.8lt and 4.5lt. Autosol Diazo sensitized, Sold per 1lt, 3.8lt. Ulano 925 WR Sold per 1lt, 3.8lt. Kiwocol Aqua 1 pot direct emulsion. No sensitizer required. Sold per 500g, 1lt, 4lt. FOR SOLVENT BASED INKS; Autosol (Fast Exposure) 2000 Kiwocol 16 Rapid Diazo sensitized, easy to strip from the screen, high solvent resistance. Sold per 4.5lt. FOR WATER & SOLVENT BASED INKS; Kiwocol Poly SRX (Dual Cure) Water and solvent resistant excellant resolution and mesh bridging Sold per 1lt, 3.8lt. Quantum For ultra fine work. halftones ect.. giving very high resoltution with an extra strong stencil. Sold per 900g, 3.7kg. Hardener Can be applied to the image to make a permanent stencil, where very long print runs are required. (EMULSIONS CANNOT BE REMOVED AFTER USE. NOT TO BE USED ON NYLON MESH) Emulsion Coaters To coat screens with emulsion, Stock sizes to fit stock screens, Other sizes made to order.

Photographic Films Although a film stencil is more expensive to use than an emulsion stencil It does give better detail & a sharper print. Films can be placed into 3 catagories 1. Indirect (to be developed) The film is exposed, developed in a hydrogen peroxide bath, washed out in water then mounted onto the screen. It can achieve very fine detail while maintaining stencil strength. Autotype 5 Star Sold per 104 x 1000cm rolls (Fine detail work.) Autotype Green Star Sold per 104 x 1000cm rolls (Heavy duty film.) 2. Direct(no developing) The film is exposed, washed out in water then mounted on to the screen, an easy film to use, ideal in a school situation. Novastar Sold per 104 x 500cm rolls - Ideal for school use. 3. Direct Capillary The film is mounted onto a wet screen dried & exposed, then washed out in water Ideal for longer print runs, easy to use, and available in different film thickness. Also with this film, a direct emulsion can be applied to the squeegee side of the screen thereby giving even longer print runs. Autotype Capillex Sold per 104 x 1000cm rolls in 18, 25, 35 & 50 micron thickness. The thicker the film, the more ink deposit laid. Autotype Capillex XR Sold per 104 x 500 & 1000cm rolls in 30 & 80 micron thickness. (Water resistant) Other Films, Hand cut & Drawing ect..

Blockouts

A blockout solution is used to blockout any areas of the screen that the stencil
has not covered, including pinholes.
There are three types stocked

Lacquer Blockout Suitable for all inks except lacquer based inks; wash out with Lacquer Thinner ect.. Sold per 1lt & 4lt

Blue Water Base Blockout (Slow) A slow drying blockout, suitable for all inks except water based. Can be force dryed in front of a heater. Although slow drying, it is more solvent resistant, compared with Fast Blue Excellent for touching up pinholes. Sold per 1lt, 5lt, 25lt.

Blue Water Base Blockout (Fast) A fast drying blockout, suitable for all inks except water based. for fast screen turnover Sold per 1lt, 5lt, 25lt.

TIP
When a photographic emulsion has been used
as the stencil, this can also be used as a blockout
Blockout the screen, leave to dry, and re-expose to light.

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