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  1. #11
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    Quote Originally Posted by photomc
    From another rookie, that just started using the 9010 - it's all new to me - have noticed the same results as Mateo. If the humidity has been low (as in <50%) and temp is cold (meaning the heat is running) the paper seems to need a little more humidity. Just set up a humidifer, so can't comment on results from that yet. You would think preping paper for 4x5 would be a snap, but not always. Does anyone know of a way to measure the mositure in the paper? Thought about finding that, because as Mateo stated, when you catch the paper at the right point in drying it seems to work great.
    Move your paper into the coating area at least a day before coating and humidify the coating room to about 60%. The paper will absorb water over a period of time.

    If the paper has a crackle to it then it's too dry. If it is too wet it will feel limp.

    Don Bryant

  2. #12

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    I pick the solution with a serynge and I put it on the paper along the wide edge. I then immediatelly start brushing. I never liked the pouring in the center technique, seems to me you get a lot of the stuff in the center and not as much in the edges.

  3. #13
    Jeremy's Avatar
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    I use the technique clay taught me where you use a shot glass and drag the solution down one side of the paper with the rim of the glass and start brushing. Once I got the actual brushing part down my coatings have been very even.
    Let's see what I've got in the magic trash can for Mateo!

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  4. #14

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    I generally know if I'm gonna have streaks before the paper is even dry, I was foolish enough to choose gum bichromate as the first hand coated process I tried and the thicker emulsions can be very troublesome but the most important thing I’ve discovered is knowing when to STOP brushing. If some emulsion is dry or at least more dry and you continue bushing over it you will get streaks more times than not. At least I do anyway.

    Happy Days
    You can't be lost if you don't care where you are.

  5. #15

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    Quote Originally Posted by donbga
    Hi Michael,


    Question: How are you initially dispersing the sensitizer on the paper? When brush coating I normally pour the sensitizer onto the center of the paper. I seem to be getting more sensitizer on the "top" half of the paper, suggesting that my technique is flawed. And I am double coating, BTW.

    Don Bryant
    I coat pretty much as Michael described, brushing in both directions, left to right and back, and also up to down and back, all on the same sheet of paper, plus I also brush on the diagonal in both directions. The paper is fairly wet when I finish coating, but there should be no puddling.

    To disperse, I pour the sensitier right in the middle of the area to be covered, very quickly, and immediately spread it in all direction. I have not experienced any uneveness in coating this way.

    How much solution are you using? For an 8X10 print I double coat, using four total ml of sensitizer, 2 ml per coating, though I dilute the first coating 1:1 with water.

    Sandy

  6. #16
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    Quote Originally Posted by Jorge
    I pick the solution with a serynge and I put it on the paper along the wide edge. I then immediatelly start brushing. I never liked the pouring in the center technique, seems to me you get a lot of the stuff in the center and not as much in the edges.
    Jorge,

    Funny you should mention using a syringe, I was thinking of using this myself since this is how I always did it when using a glass rod.

    Don

  7. #17
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    Quote Originally Posted by sanking
    I coat pretty much as Michael described, brushing in both directions, left to right and back, and also up to down and back, all on the same sheet of paper, plus I also brush on the diagonal in both directions. The paper is fairly wet when I finish coating, but there should be no puddling.

    To disperse, I pour the sensitier right in the middle of the area to be covered, very quickly, and immediately spread it in all direction. I have not experienced any uneveness in coating this way.

    How much solution are you using? For an 8X10 print I double coat, using four total ml of sensitizer, 2 ml per coating, though I dilute the first coating 1:1 with water.

    Sandy
    I'm using 2ml per 8x10 per coat. I haven't been spreading the sensitiser evenly as you suggest. I'll amend my technique.

    Don

  8. #18

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    Quote Originally Posted by donbga
    I'm using Stonehenge White and Fabriano Satinata this time around. Do you wet the brush with water before each print?
    Don,

    I haven't used either paper, so I cannot comment specifically on them, so take my suggestions as educated guesses only...

    I often coat several sheets in a row. The first one gets a H2O dipped and shaken brush. After that, I don't bother as the brush is typically at the correct wetness for the rest of the sheets, and it is partially loaded with sensitizer, which is better to use for loading the brush anyway.

    Quote Originally Posted by donbga
    Question: How are you initially dispersing the sensitizer on the paper? When brush coating I normally pour the sensitizer onto the center of the paper. I seem to be getting more sensitizer on the "top" half of the paper, suggesting that my technique is flawed. And I am double coating, BTW.
    I typically pur it in a long stream across the center of the sheet and rapidly spread it into the four corners, and then fill in the rest of the sheet. I will then brush L-R-L-R from the top to the bottom, and then T-B-T-B from left to right to ensure an even distribution of the solution. That's it. The paper will be really wet when I stop, because if it has started to go velvet, you may see streaking from buildup of sensitizer on the surface which will wash away in the developer.

    Quote Originally Posted by donbga
    The paper does appear to be very wet when I've finished coating and does appear to look evenly coated, I'm also adding a couple of drops of Everclear per ML of sensitizer. Do you try to overlap the brush strokes?
    I've done some tests with Everclear, and it causes problems. In most cases, it makes the solution penetrate the sizing too quickly, and will result in streaking. Not to say that it can't be helpful for some things, but I haven't found a useful application in my pt/pd printing with the papers I am using (gum printing is another issue). I'd suggest dumping the Everclear.

    Are you thinking of PVA as a thickening agent? Everclear will essentially make the solution 'wetter' which will cause it to run into the fibers of the paper faster. PVA acts as a thickening agent, which will slow down the absorption. I don't use PVA either, but I did find it can be helpful, and it may increase the dmax of the print a little with some papers.

    I definitely overlap the brush strokes. I move pretty fast, so there isn't a whole lot of precision in the process, so I probably overlap the brush by 1/4 or so each time.

    Since you are double coating and still seeing streaks, my guess is that it has to do with the paper sizing, either a problem with the Everclear, or maybe a problem associated with the sizing in the paper or the humidity in the paper.


    ---Michael
    www.mutmansky.com
    B&W photography in Silver, Palladium, and gum bichromate.

  9. #19
    Jeremy's Avatar
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    I've been using one drop of vodka (didn't have any everclear in the bar) with just my first coat and it has worked wonders.
    Let's see what I've got in the magic trash can for Mateo!

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  10. #20
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    Quote Originally Posted by sanking
    How much solution are you using? For an 8X10 print I double coat, using four total ml of sensitizer, 2 ml per coating, though I dilute the first coating 1:1 with water.
    So, 4ml of liquid (of which 2ml are sensitizer and 2ml are water) in the first coat and 2ml of liquid (all sensitizer) in the second?

    Dean

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