Can you screen print with halogen lights?
Can you screen print with halogen lights?
Looking for an affordable way (and more reliable than the sun) to burn screens? Look no further than our Exposure 500 watt Halogen Light. This exposure light, when placed roughly 12 inches above a screen, will expose most dual cure emulsions with a 1:1 thin coating in 6-9 minutes, or thicker coatings in 8-11 minutes.
What watt bulb do I need to screen printing?
A 250-watt bulb or 500 watt halogen light.
What happens if you overexpose a screen?
An overexposed screen won’t allow for enough ink through your screen while printing— resulting in prints with poor detail. An underexposed screen means you’ve lost too much emulsion and you’ll be throwing too much ink.
Do LED lights work for screen printing?
To summarize, if you are building your own exposure unit, the type of exposure lamp that you use is not that critical if you are going to be printing “easy to expose” art and your screens are coated with photopolymer emulsion. Yes, fluorescent, halogen bulbs and LED lights will work.
How do you determine the exposure time of a screen test?
Wash out the screen, allow to dry, and determine which row came out best. Lastly, take the number of the best row and subtract from 11. 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. If you were burning in 18 second increments, the correct exposure time would be 126 seconds (18×7=126).
What is the best type of light for screen exposure?
As previously explained, the ideal light for screen exposures is one that is rich in ultra-violet (UV) light. Fluorescent and halogen lights are low in UV light. But they are low cost to purchase and readily available. This is why most low cost exposure units have them as a light source.
How long does it take to pre-sensitize fluorescent light bulbs?
Pre-sensitized w/ uv fluorescent bulbs – 3 minutes. Pre-sensitized w/ 1,000w metal halide – 1 minute. 2 part diazo w/ 500watt halogen light – 15 minutes. 2 part diazo w/ uv fluorescent bulbs – 6 minutes.
What type of exposure light do I need for my project?
In that case, you will need a commercial exposure unit that uses a UV rich light source (metal halide or mercury vapor bulb) and has a light integrator to control the light output accurately during the exposure process. As previously explained, the ideal light for screen exposures is one that is rich in ultra-violet (UV) light.
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