Coat your screen with this photo emulsion, let it dry and expose your image.Speedball Emulsion: http://www. 2 part diazo w/ 1,000w metal halide - 2 minutes. How to mix up photo emulsion for screen printing.2 part diazo w/ uv fluorescent bulbs - 6 minutes.I am using a UV light and nothing happens. 2 part diazo w/ 500watt halogen light - 15 minutes. I am using Speedball photo emulsion and I cannot burn my image to screen.Pre-sensitized w/ 1,000w metal halide - 1 minute.Pre-sensitized w/ uv fluorescent bulbs - 3 minutes.Pre-sensitized w/ 500watt halogen light - 8 minutes.*Not sure where to start? Try plugging in these numbers for step 1 and go from there: If you were burning in 18 second increments, the correct exposure time would be 126 seconds (18x7=126). For example, if row 4 came out the best, 11-4=7, meaning row 4 got exposed a total of 7 times during the test. Lastly, take the number of the best row and subtract from 11.Wash out the screen, allow to dry, and determine which row came out best.Continue moving the paper down and exposing until you have reached the bottom.Expose the screen for the amount of time you came up with in Step 3 again. How To Remove Screen Printing From Shirts Screen printing is a technique that uses ink and an emulsion to produce graphics on a garment.Move the thick, opaque paper down to where it is covering all but the first 2 rows.Underexposure: if there is still a colour change on the factor 0.7 and factor 1.0, this indicates a completely. This gives the correct final exposure time for that stencil, mesh and light source combination. Some seem to be able to milk a little more time out of them by refrigeration, but if youre not using that much emulsion youd be better off buying a pure photopolymer emulsion like Ulano QTX or Saati Textil PV. Expose the screen for the amount of time you came up with in Step 3. Once the correct column has been chosen, multiply the factor on the top (1.0 / 0.7 / 0.5 / 0.33 / 0.25) by the exposure time. Most diazo and dual-cure emulsions are only good for about a month.Tape the calculator to screen, and cover all but the first row with thick, opaque paper.Take your new time calculated in Step 2, and divide by 10.Take that amount of time, and multiply by 1.5 (Ex. This is nothing more than exposing the screen on the unit for 10 to 15 minutes or setting it in the sun for 5 minutes, why During your initial exposure your.*Guess how long it will take for your screen to burn (Ex.We understand this math can seem a bit intimidating at first, but just take your time and trust the formulas. Also, be sure to coat all your screens in the same way for consistent burn times.įree Download Calculating Your Exposure Time We found 0 results matching your criteria.įinally, a FREE exposure calculator for anyone to download and use! Simply download the file, print out on a transparency film, and then start calculating your proper screen exposure times! We recommend performing the exposure test on each different mesh count you use for optimal results.
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