Showing posts with label Coating plates. Show all posts
Showing posts with label Coating plates. Show all posts

Monday, November 9, 2009

A Pot to pour plates with


My sister in law was showing us how to clean our noses, when I said, "Hey, wait a minuet, where did you get that Pot?" I thought it would be perfect to pour emulsion out with. Since I havn't been able to find one in Thrift Stores, I went over to the local Whole Foods Store and got one. It is called a NETI POT, breath easier. www NetiPot dot org. HA, it is even from my state, PA.

Thursday, July 23, 2009

Second Pour

A full bottle of emulsion takes a while to heat up enough to get it out of the bottle. It was put into a slightly larger sized stainless steel coffee peculator pot, and sat on the strainer lid! Just like a pressure cooker; the lid on the bottom keeps the plastic container from getting too hot.
When warm enough to pour, some was put into a stainless steel daylight developing tank. That, in turn, was floated in warm water in a Pyrex measuring cup.
Temperature was monitored. The small amount was allowed to cool to the required temperature (do the math). More was put in there for the next time. It will be easier to warm up a small amount than the entire bottle.
The plastic apron went on, and the developing tray, white, went on my lap; I sat. The plates done yesterday were in a light safe. They were very much uneven to say the least. Both were covered again. The plates were done at room temperature and not warmed up first; that proved to be an error, warming them did.
The light safe was put onto the enlarger base, checked with a level.
This is cool: The emulsion bottle came in black plastic bag in the box. With the bottle in the pot, the bag is put over it, squeezed to get air out and slid all the way to the bottom. That way I can get out of the room without exposing the emulsion; some light gets in, when the door is opened, as this darkroom doesn't have a light tight walk way exit. Then the door is shut again. Bad design that but a cool workaround.

Wednesday, July 22, 2009

First pour

Two 4x5 plates were coated with Liquid Light. I hope. Red light was used, only one about 6 feet away. The bottle of emulsion was unpacked in red light and placed in a large Pyrex measuring cup. That in turn was filled with hot water and let sit a little bit. A two reel stainless steel developing can was also filled with hot water. A hot plate was turned on low. The glass sheets were in a 4x5 tray both on the edge and along a center ridge forming a wedge. It would have been easier to find that tray if it had been white instead of black.
The first time I tried to pour some emulsion out of the bottle nothing came out; it must melt first. It doesn't come out easy; the more that melts the easier it is. Some was poured into the stainless steel can and that was put on the now off hotplate. One sheet of glass was warmed up on the hot plate. Then, some emulsion was poured onto a glass sheet; it moved easily.
It spilled onto my pants, on the floor, on the table. Wear a plastic apron. I was sitting down for the first sheet and put a developing tray on my lap for the second try. It didn't look like it was coating the glass evenly; rather, it pooled or left holes. More was added; it spilled off into my hand; I held the glass by the sides or the corners.
Warming up the plate helped some. both plates went into a paper safe. The emulsion got sticky pretty fast.
A thorough clean up followed.
The plates are allowed to dry inside the box. I'll open it in the dark a few times to change the air inside it since it is made of plastic, but it is large.