Ryan Screen Systems a Division of Lawson Lawson Screen & Digital Products Ryan Screen Systems a division of Lawson
5110 Penrose St.
St. Louis, Mo 63115
Phone: 314-631-8753
Toll Free : 800-769-9130

Adhesives

Art Files
Blockout
Degreaser
Dryers
Dryer Elements
Emulsions
Emulsion Remover
Equipment Packages
Exposure Units
File Holder
Flash Units
Hand Cleaner
Hinge Clamps
Home Page
Ink Buckets-Empty
Ink Degradent
Ink Mixing
Ink Plastisol
Ink Scoop
International Coatings
Ink Wash
Laser Targeting
Laser Film
Lease Form
Lease Reasons
Mesh
Mesh Panels
Number Stencils
PMS Color Mixing
Pads
Pallet Adhesive
Pantone Mixing
Pellons
Plastisol Remover
Pocket Printer
Pressure Washer
Printers Automatic
Printers-Cap
Printers-Numbers
Printers-Textile
Screens- Aluminum
Screen Cabinet
Screen Dryer
Screen Opener
Screen Racks
Screens-Wood
Scoop Coater
Scorch out
Scrub Pads
Shipping Map
Spatula
Squeegee w/handle
Squeegee Material
Squeegee Sharpener
Start Up Kits
Tape
Tension Meter
Temperature Strips
Transfer Machines
UPS Map
Vellum
Washout Booth


Silk Screen Printing Tip

Screen Printing Emulsion and Sensitizer Mixing

These instructions are for mixing a sensitizer to a photo sensitive emulsion used in screen printing. These emulsions are known as Dual Cure or Diazo. Photopolymer emulsions have the sensitizer pre mixed into the emulsion.

There are 2 types of sensitizer used in the screen printing world, powder and liquid. The powder sensitizer is harder to dissolve, so you need to spend more time shaking the bottle.

It is normal for the sensitizer to change the emulsions color after mixing.

Before you start opening containers you need to have

1. A spatula for stirring
2. Towels for clean up
3. An area under low light conditions. Usually a yellow or red light.
4. Access to tap water
5. A table covered with news paper for fast clean up

Instructions to mix the sensitizer with the sensitizer.
1.
Open the emulsion container and the sensitizer bottle.
2.
Fill the sensitizer about 1/2 full with tap water.
3.
Replace the cap and shake well.
4.
Pour contents from the sensitizer bottle into the emulsion container
Optional step-
you can if you wish, mix the sensitizer with the emulsion
5.
Refill sensitizer bottle 1/2 way full with tap water
6. Replace the cap and shake well
7. Pour the contents from the sensitizer bottle into the emulsion container
8. Using your spatula, mix the sensitizer and emulsion together, until you are back to one solid color. Be sure to scrape the sides and the bottom.
9. Place the lid back onto the emulsion container.
10. Let sit for 1-2 hours (See "Note" below).
11. Throw the empty sensitizer bottle into the trash

Note: Always stir the emulsion before it is used. If it is not mixed the solids go to the bottom, and the sensitizer floats to the top. The emulsion on top with all of the sensitizer exposes great, but when you get half way down the container, your emulsion does not expose properly.

Sensitized Emulsion Storage- Keep sensitized emulsion in a cool dark place like the refrigerator.