Indirect films offer superior fine detail reproduction; sharp printing edges; uniform stencil thickness; predictable standardized exposures; close control of stencil thickness, hence ink deposit; fast and simple stencil production; and easy stencil removal for efficient mesh recovery. All Ulano gelatin-based Indirect Films are totally solvent resistant. The topcoat on Ulano Indirect Films prevents tackiness underconditions of heat and high humidity.

Ulano Gelatin Indirect System Photographic Films provide the ultimate in stencil resolution and definition. The film is exposed, developed in A + B solution to harden the exposed aread, (except Ulanolux UP3 and Pulsar), washed out and adhered to the mesh of a screen. After drying and blocking out, the transparent backing is removed.

All Indirect System Photographic Films consist of a light-sensitive emulsion coated on a transparent base or backing sheet, with special adhesives.

Indirect Films, (sometimes referred to as transfer films), are ideal for applications involving shorter (2,000 - 4,000 impressions) printing runs, fine details, and excellent definition; and for easy, reproducible, clean stencil production.


Underexposed: Stencil will be thin (and look thin) resulting in poor press endurance. Underexposing for resolution much finer than the job you will print sacrifices durability. 
Overexposed: Stencil will be thick (and look thick) resulting in poor adhesion due to overhardening.


  • Press-ready stencils in as little as 30 minutes
  • Stencil thickness, hence ink deposit, can be adjusted by exposure
  • Superior solvent resistance
  • Dimensional stability of backing material promotes excellent registration
  • Humidity-protective topcoat layer guards against tackiness under humid conditions
  • Completely phthalate free
  • Simple handling requirements
  • No messy chemicals, no liquid emulsions
  • No darkroom or soft-blanket vacuum frame required
  • Presensitized
  • Stencil can be examined before transfer to screen
  • Excellent storage properties
  • Fast, easy stencil removal
  • Optical flatness of support layer promotes excellent definition for line and halftone work.

* Longer rolls available upon request.

A & B DEVELOPER POWDER | Gelatin Based Indirect Photographic Films


For use with:

Quasar R 100
Super Prep®
Blue Poly®-2 and 3
Red TI® 

A & B Developer Powders are paired bottles of pre-measured, pre-weighed dry ingredients that are dissolved in tap water to make fresh developer solution for Ulano gelatin-based (iron salt sensitized) indirect system, photographic stencil films.


 ABP | 1 Pint (473 cc) | 8 | 20

 ABQ | 1 Quart (946 cc) | 20 | 6

 ABG | 1 Gallon (3.8 liters) | 20 | 2


A & B Developer Powders are pre-measured for mixing pints, quarts, or gallons of developer solution. As a user of Ulano Indirect System Photographic Films, A & B Developer Powders remain your best assurance that the developing step will be a constant in your stencil processing.

Because A & B Developer bottles are tightly sealed, the contents will not degenerate in storage (unlike hydrogen peroxide). This assures absolute freshness and proper concentration of the developer solution. A & B Developer Powders contain special buffers that minimize the effect of mineral content in your water. Pre-weighed, pre-mixed, fresh-until-opened A & B Developing Powders effectively eliminate any variables in the developing step when you process indirect system gelatin-based films.

Tech Data Sheet (English)

BLUE POLY 2 | General Screen Printing Work

Blue, medium thickness emulsion on a 2-mil optically flat polyester backing.Combines wide exposure latitude with excellent resolution. Ideal for general screen printing work.

Resolution: 75 - 100 microns (3 - 4 mils)

  • BP2202 | 40" X 150"
  • BP2213 | 40" X 300"
  • BP2313 | 44" X 300"

Tech Data Sheet (English)

BLUE POLY 3 | General Screen Printing Work

Blue, medium thickness emulsion on a 3-mil optically flat polyester backing. Same as Blue Poly-2, except for the thicker backing, which affords additional dimensional stability and easier handling of large stencils. Slightly less resolution than Blue Poly-2.

Resolution: 87 - 112 microns (3.5 - 4.5 mils)

  • BP3202 | 40" X 150"
  • BP3213 | 40" X 300"

Tech Data Sheet (English)

    QUASAR R 100 | Graphic & Electronics Work

    Modern formula, red gelatin indirect system photographic stencil film with wide processing latitude, excellent edge definition and high resolution. Suitable for a wide range of applications including graphics and electronics.

    Resolution: 40 - 60 microns

    • QR10042x150 | 42" x 150"
    • QR10042x197 | 42" x 197"
    • QR10042x394 | 42" x 394"
    • QR10042x600 | 42" x 600"

    RED TI | Fineline & Halftone Work

    A dark red film with a thick emulsion on a 2-mil optically flat polyester backing. Produces a thick stencil that adheres well to all meshs, yet has extremely high resolution and definition and wide exposure latitude. Thin topcoat for use with automatic developing machines. Ideal for fine line and halftone work and a wide range of electronic printing applications, especially solder mask. 
    Resolution: 50 - 75 microns (2 - 3 mils).

    UPT 14213 | 42" X 300" | 6 | 20 LBS.
    UPTI 4231  | 42" X 600"  | 6 | 52 LBS.

    Tech Data Sheet (English)

    SUPER PREP | General Graphics Work

    A green emulsion on a 2-mil optically flat polyester backing. Wide exposure latitude. Hides dust, tape marks and positive edges very well, minimizing the need for touchups. Excellent adhesion to all synthetic mesh. Not intended for high resolution applications, but suitable for general graphics work.

    Resolution: 100 - 125 microns (4 - 5 mils)

    • SP202 40" X 150"
    • SP213 40" X 300"
    • SP313 44" X 300"

    Tech Data Sheet (English)

    ULANOPREX | Best Indirect Film Resolution

    Light blue emulsion on a 2-mil optically flat polyester backing. Very hard gelatin for ultimate copying properties. Fast exposing.  Suitable for negative printing and fine halftone work. .

    Superb resolution 30 - 50 microns

    Tech Data Sheet (English)




    • Gelatin films will not perform correctly if stored in humidity less than 30%.
    • Use a humidifier to increase the storage aread to an ideal of 50%


    Used or surface-treated mesh need only be degreased using Screen Degreaser Liquid No. 3 or dilute Screen Degreaser Concentrate No. 33. New mesh that is not surface treated should be mechanically abraded. This increases the surface area of the mesh surface for a better mechanical bond of the stencil. Use Microgrit No. 2 before degreasing. Abrading and degreasing can be combined in one step with Ulanogel 23. Rinse thoroughly with clean water.



    Place the emulsion side of a right-reading photo positive against the backing sheet of the stencil film in a vacuum frame. The positive should be between the light source and the stencil film, and the exposure should be through the backing sheet of the stencil film

    From the Base Exposure Table below, select a Base Exposure Time corresponding to the film you are using and the light source you have. Multiply the Base Exposure Time by the factor for each relevant variable listed in the Exposure Variables Table below to find your Approximate Exposure Time. Use the Approximate Exposure Time as the central time in a Step Wedge Test, or with the Ulano Exposure Calculator.



    Dissolve pre-measured A & B Developer Powders according to the instructions on the packet. (Hydrogen peroxide can be used if A & B Powders are not available. It should be diluted to a 1½% solution in a clean glass or plastic container using distilled water only.)

    Place the exposed film, emulsion side up, in a developer tray. Pour the developer solution quickly and evenly over the film. Let the film develop for 90 seconds (180 seconds for UlanoPrex). Rock the tray occasionally to carry fresh developer across the surface of the film.


    Use a gentle washout spray preferably with an aerator nozzle to wash out the stencil at the recommended temperature. Water temperature will effect your washout time.

    Recommended Washout Temperatures for Gelatin Films

    Blue Poly-2, Blue Poly-336-40°C | 97°-104°F        

    Quasar R 100 : 36-40°C | 97°-104° F                                         

    Super Prep : 38-41°C | 100°-105° F             

    Red TI  : 41-43°C | 105°-110° F

    UlanoPrex  : 43-49°C | 110°-120° F


    Wash out the film for several minutes until all the unexposed emulsion has been washed away. Then, gradually lower the temperature of the water to room temperature. Continue to wash for 30 seconds.


    Place the washed out film, emulsion side up, on the buildup board. Gently lower a properly prepared, damp screen, printing side down, onto the film. Place a pad of newsprint (unprinted newspaper stock) on the squeegee side of the screen. Wipe over the newsprint pad with a folded rag or print roller to blot the soft top layer of the film up into the mesh. Remove the bottom sheets of wet newsprint, and continue blotting. Repeat this procedure until the newsprint picks up little or no color from the film emulsion.

    Problems adhering usually come from old film, developing in water hotter than recommended, or over exposure.


    Dry the adhered stencil thoroughly with cool air. When the mesh surrounding the film is dry (and before the stencil is dry),with the plastic support still in place, apply Screen Filler No. 60 or Extra Heavy Blockout No. 10 to the open area of the screen. After the stencil and blockout have both dried, peel off the plastic support.


    Remove all ink from the screen with the recommended solvent. Degrease with Screen Degreaser Liquid No. 3 to speed stencil removal. Wet both sides of the stencil with hot water and let stand for a few minutes. Use Enzyme No. 1 neutralized with vinegar to remove the stencil.