The emulsion includes the required sensitiser and works well for beginners and advanced printers. Screen Chem Catalyst - makes emulsion permenant. Add a small amount of water to diazo-sensitiser and shake well. Since it is a polymer emulsion we recommend you work in an area with low to little light, not under a direct light or in sunlight.
We recommend you always degrease the mesh. As a general indication, we suggest you apply 1 or 2 coats of emulsion on the external face of the screen and 1 or 2 coats on the internal face, wet on wet, then a final dry coat on the inside of the screen to push the emulsion to the back of the screen. Lamp type, distance from lamp to screen, mesh type and coating thickness can affect exposure time. To determine the correct exposure time, we suggest you conduct some tests with an exposure calculator.
Our suggestion: Lighting halogen: W Application: internal coats, external coats Mesh T white 60 sec. As always, these time and temperatures are guidelines, many aspects can affect the exposure times. Please use Easiway TO remove this emulsion or easiway supra for use with a dip tank.
If you would like more information then please give us a call on 0 or use our Webchat or Email. Safety Data and Technical sheets click Here. For this kind of emulsion, you will want an exposure unit with a timer and a darkroom equipped with washout booth and supplies. This kind is great to work into, but you may run into more issues if you get into this type too soon. A good example of presensitized emulsion is Baselayr Complete. Diazo mixed emulsion requires the addition of a Diazo powder before printing.
When you mix the diazo, make sure to use water with a neutral pH balance like distilled water. You don't want to use tap water because the minerals within the water make interfere with the diazo. Once mixed, the emulsion may last for two months if you store it in the fridge. Do not store it in an environment that's too cold because the emulsion can freeze. If you store the diazo emulsion on a shelf in your shop that's in the mids, it could last for six weeks.
If the shop is in the mids, the emulsion could last weeks. The diazo-mixed emulsion takes longer to expose but is more forgiving. Since it takes longer to expose diazo emulsions, your window of error is larger.
Say you expose a screen for 10 minutes, you could go over or under by a minute. Diazo emulsion works great with units that do not have timers and it can be washed out under UV light successfully most of the time without any issue, allowing you to wash out this emulsion outside. Diazo-mixed emulsions are also cheaper and less of a headache for those just getting into screen printing. This type is more forgiving, while still retaining high quality and detail. A great example of diazo-mixed emulsion is Baselayr Long Lasting.
Beginners, use diazo. Since it takes longer to expose, it's more forgiving to errors whether it's from exposing issues or light leakage. Intermediate printers, it'll depend on your space and how comfortable you are with your skills. If you have a solid exposure unit and a light safe environment, you could start dabbling in presensitized emulsions. Keep using diazo emulsions for your jobs and play around with presensitized emulsions. Advanced printers, use whichever emulsion you want. Still, it is important to pick the right screen emulsion depending on its final use.
We keep getting asked "which screen emulsion to use? Screen emulsions are all chosen specifically by us to reproduce the very best in print definition. We choose them based on the following criteria: resolution, long life and easy removal after use. Emulsion Removers. We carry a complete line of Screen Printing Emulsion supplies. The important factors to look for are the following: The emulsion should yield a strong stencil so that it may not break down during the printing It should be easily reclaimable.
The speed of exposure.
0コメント