Customer Reviews
Franmar Chemicals

Diazo Screen Printing Emulsion

Diazo emulsions are traditional two-part screen printing emulsions known for their wide exposure latitude and durability. These emulsions require mixing a diazo sensitizer with the emulsion base, creating a light-sensitive stencil system that is forgiving during exposure.

Diazo emulsions work well with plastisol inks, and many are specifically formulated for either water-based/discharge printing or solvent-based applications. Because formulations vary, it’s important to choose a diazo emulsion designed for your specific ink system.


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Chromaline 10-Step Exposure Guide for screen printing exposure testing
Price: $14.95
Availability: Stock
Chromaline Item #: 2810SEG -

    The Chromaline 10-Step Exposure Guide is a compact exposure testing tool designed to help screen printers establish accurate exposure times for emulsion-coated screens. By exposing the guide alongside your artwork, you can evaluate exposure results and fine-tune your process for improved stencil quality and consistent print performance. Proper exposure is essential for producing durable stencils with sharp image detail and reliable reclaimability. The 10-step guide provides a simple and...

    Exposure Calculator for screen printing emulsion exposure testing
    Price: $75.00
    Availability: Stock
    Chromaline Item #: 28CEC -

      The Chromaline Exposure Calculator is an essential screen printing tool designed to help printers determine the correct exposure time for emulsion-coated screens. Suitable for both beginners and experienced screen makers, this easy-to-use calculator combines three quality checks into one convenient tool, allowing you to determine proper exposure time, evaluate print quality, and verify halftone reproduction before production begins. Proper exposure is one of the most important steps in...

      827WR Water Resistant Emulsion Gallon
      Price: $52.50
      Availability: Stock
      Atlas Screen Supply Company Item #: 25EP827WR5 -

        EconoPRO™ 827WR Diazo Emulsion is a blue diazo screen printing emulsion formulated for use with plastisol inks and water-based inks. It features 42% solids, a 13,000–15,000 CPS viscosity, and offers wide exposure latitude, excellent resolution, fast drying, superior humidity resistance, and easy reclaimability, making it suitable for a variety of screen printing applications. To prepare the emulsion, dissolve the supplied diazo sensitizer in water and mix thoroughly into the emulsion until...

        827WR Water Resistant Emulsion Quart
        Price: $22.75
        Availability: Stock
        Atlas Screen Supply Company Item #: 25EP827WR2 -

          EconoPRO™ 827WR Diazo Emulsion is a blue diazo screen printing emulsion formulated for use with plastisol inks and water-based inks. It features 42% solids, a 13,000–15,000 CPS viscosity, and offers wide exposure latitude, excellent resolution, fast drying, superior humidity resistance, and easy reclaimability for a variety of screen printing applications. To prepare the emulsion, dissolve the supplied diazo sensitizer in water and thoroughly mix it into the emulsion until completely...

          Chromaline CP Tex diazo screen printing emulsion gallon
          MSRP:  $81.89
          Price: $77.80
          Availability: Stock
          Chromaline Item #: 28CPTEX5 -

            Chromaline CP Tex Diazo Emulsion is a premium diazo-sensitized screen printing emulsion developed for textile printers who need one dependable emulsion for multiple ink systems. Compatible with plastisol inks, water-based inks, and discharge inks, CP Tex combines fast exposure with an exceptionally wide exposure latitude, making it easier to achieve consistent, high-quality stencils across a variety of shop conditions. Its light violet color provides excellent stencil visibility for inspection...

            Chromaline CP Tex diazo screen printing emulsion quart
            MSRP:  $41.11
            Price: $39.05
            Availability: Stock
            Chromaline Item #: 28CPTEX2 -

              Chromaline CP Tex Diazo Emulsion is a premium diazo-sensitized screen printing emulsion engineered for textile printers who need dependable performance across multiple ink systems. Designed for use with plastisol inks, water-based inks, and discharge inks, CP Tex combines excellent exposure latitude with outstanding water resistance, making it an excellent choice for demanding production environments. Its light violet color provides excellent stencil visibility for easier inspection while...

              Learn More About Diazo Emulsion

              What Is Diazo Emulsion?

              Diazo emulsion is a two-part system consisting of an emulsion base and a diazo sensitizer. Once mixed, the emulsion becomes light-sensitive and can be coated onto a screen to create a stencil.

              Compared to other emulsion types, diazo emulsions expose more slowly but provide greater flexibility during the exposure process.


              When to Use Diazo Emulsion

              Diazo emulsions are best suited for:

              • plastisol ink printing
              • water-based and discharge printing (when using water-resistant formulations)
              • solvent-based printing (when using solvent-resistant formulations)
              • shops using fluorescent or metal halide exposure systems
              • printers who need wider exposure latitude and forgiving exposure times

              Because diazo emulsions vary by formulation, selecting the correct emulsion for your ink system is important for achieving consistent results.


              Diazo vs Photopolymer Emulsion

              Diazo emulsions require mixing and expose more slowly, but they provide a wider exposure latitude, making them more forgiving during the exposure process.

              Photopolymer emulsions expose much faster and require no mixing, but they are less forgiving and require more precise exposure control.


              Diazo vs Dual Cure Emulsion

              Dual cure emulsions combine the benefits of diazo and photopolymer chemistry, offering improved durability and faster exposure times.

              Diazo emulsions remain a good option for printers who prefer a simple, forgiving system and do not require high-speed exposure.


              Choosing the Right Emulsion

              Not sure which emulsion is right for your shop? Choosing the correct emulsion depends on your ink system, exposure unit, and level of detail required.

              For more options see our full selection of screen printing emulsions. Selecting the proper size scoop coater is essential for proper coating.

              Not sure which emulsion is right? See our Screen Printing Emulsion Guide for a full breakdown.