![]() ![]() I used to add glycerol (around 1% of final volume) to my DCG emulsion but found I got much better storage if this was omitted. Plate 1 had the super-hold tape and so will be a thicker layer. Added a second 1.0 mL of 1% safranin to the remaining emulsion and mold coated the second plate following the first. I checked an aliquot of the emulsion after coating the first plate and noted it was fairly faintly colored. Placed in (dedicated, non-food) refrigerator for overnight gelling. Allowed emulsion to fill the entire surface. Lowered upper plate (thick rain-X glass) onto lower (clean) plate. Removed warmed plates, placed upon prepared paper towels on a level surface. Sheets into the (holography dedicated, filtered air) food dehydrator at 130 F. Dried both sheets with microfiber cloth then wiped with lint-free cleanroom wipe. I prefer the "super hold" tape but nearly ran out on the first plate.think ahead next time.Ĭleaned thick glass previously coated with rain-X following same procedure. Scotch transparent for one, Scotch "super hold" for the other. Applied two strips of tape to each long edge. Rinsed with DI water, making sure the water break test passes. Turned off stirring to allow bubbles to riseĬleaned 10x12 glass sheet with non scratch pad, hot water, and my favorite mix of laundry detergent, oxi-clean, and TSP. The absorption of safranin at 445 is relatively low, hopefully results will still allow some conclusions. ![]() Probably within the noise of my meter.Īdded 1.0 mL of 1% safranin O - because the 405 was not going to be an option for this weekend, I wanted to have a higher chance of success. pH was almost unchanged upon addition of diazo sensitizer: 5.40 before, 5.35 after. Filled 3/4 full with DI water as per instructions.Īdded 1.0 mL prepared diazo sensitizer. Speedball diazo sensitizer - comes as a viscous dark liquid inside an empty-feeling bottle. Keep beaker covered with new plastic sandwich bag to exclude dust. The emulsion and prep were as follows, largely following my typical DCG workflow:ġ1 g gelatin (Superclear 300 bloom, from Amazon) This brings me to a question I have had for a while - when beam exposures are quoted in mW/cm^2, how is this calculated with a beam intensity that is not uniform across the entire plate? Quote for a single point and measure the properties at that point in the finished hologram? The 445 is a commercial ECDL with an asymmetrical beam, but the other two are Sapphires and give excellent even (gaussian) exposure. With that in mind, I have the 445, 488, and 568 all aligned and ready to go. As we know, green is the most visible at equal power. It would seem that 405 would tend to produce great bright green replay under the same conditions. My exposures in standard DCG with the 445 and 488 are easier to make bright gold than anything else, and this represents a rather large redshift from the recording wavelengths. I too suspect 405 is underrated for display work. My table and especially the shutter depends on this so I want to complete it before using the 405. I also do not yet have a dichroic mirror for this wavelength yet (coming soon from ebay) to make it colinear with the other lasers and direct it through the same spatial filter. Attempting to realign it was not immediately successful and I had limited time today so wanted to move on to making emulsion and plates. My 405 nm laser is a homemade ECDL which was operating well at the electronics bench, but became misaligned when bringing it into the laser room. I would usually make more for a weekend session but this is experimental, and I want my thick rain-X plates back to make regular DCGs for sale. If your post doesn't post, message a mod.Alright, two 10x12 (8x10 effective after edges are cut off) mold-coated sheets are in the refrigerator. Show us your work! Be proud of what you do, showing off your work could easily influence and inspire others! Be warned: pics are fine, but if it's too "spammy" your post will be removed. Share knowledge! Every screen printer does things a little differently share your techniques However, there's nothing wrong with general discussion.Īny links to videos, articles, websites, et. Hey I'm new to this, what type of ink do you guys suggest I start with and what are the differences in types of inks? Please refrain from posts that ask across-the-board questions. No matter what your skill level, whether you are a beginner who can't register a single image to a blank sheet of paper or a print god who yawns and lays down a four-color halftone perfectly with no hinge clamps or registration marks, there are ALWAYS questions. Visit the fine-art screen printing sub-reddit: /r/serigraphy We welcome most posts, typically: questions, interesting links, tips&tricks, etc. ![]() ![]() This is a subreddit specifically devoted to the art and crafts of serigraphy(screen printing). ![]()
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