tonyowen
9-Nov-2016, 06:31
157197 157198
First of all, my apologies for submitting a very similar query to two fora (this one and the paper negative section of Image Sharing (LF) and Discussion. However, I think my query has two aspects for consideration – apparatus and materials.
To continue
I’m very confused with the ‘quality” of the last batch of paper negatives. As normal I cut up a 8x10 piece of paper from a box of Ilford MGIV RC de luxe pearl multigrade paper using a roller cutter to give me four “4x5” sheets and loaded two double dark slides. [I assume that the sheet of paper chosen was as per the box label, but as I was given the boxes of paper there is no certainty]. The paper was cut and loaded in a bedroom with closed curtains and an orange darkroom light. The only difference being that a new carpet had been laid in that bedroom. After wet chemistry processing the paper negative were scanned using a HP 3520 all-in-one printer.
Image01 and image02 (both infested with dark spots) were taken sequentially on a tide line with a gusty wind blowing at right angles to the camera line of view. Image02 is a small section of the full 4x5 positive – It is noticeable on this image that the “spots” are often in threes and a triangular pattern. In both cases the exposure was 1s and f11.
My camera is a Calumet CC 401 with long monorail. The lens is a xenar f4.7 135mm fitted with a 40.5 to 58mm ring onto which is screwed a 2x yellow filter and a lens hood.
Paper negative processing was as usual - Jobo tank and 2509 holder using Ilford PQ Universal developer [1m], Ilfostop [10s], and Ilford rapid fixer [1m].
I’ve thought up some scenarios, but would like feedback before I increase the number of variables by dismantling the apparatus or using a new of piece of paper
1] I’ve used a number of sheets of paper from the particular box of Ilford MGIV RC de luxe pearl – but there is always the possibility of a rogue piece of paper.
2] The apparent pattern of spots of image02 could be inferred as due to static from the new carpet.
3] Dust from cutting the 8x10 paper generates dust – could this be transferred to the DDS?
4] A windy, wild, wet, salt laden situation could put drops on the filter, but the spots seem to be much smaller than would be expected from water droplets.
5] Similarly it is unlikely that salt crystals on the filter would change their arrangement over the 10 minutes of so I was in front of the surging tide.
6] Dust within the bellows???
Any and all help welcome.
Regards
Tony
First of all, my apologies for submitting a very similar query to two fora (this one and the paper negative section of Image Sharing (LF) and Discussion. However, I think my query has two aspects for consideration – apparatus and materials.
To continue
I’m very confused with the ‘quality” of the last batch of paper negatives. As normal I cut up a 8x10 piece of paper from a box of Ilford MGIV RC de luxe pearl multigrade paper using a roller cutter to give me four “4x5” sheets and loaded two double dark slides. [I assume that the sheet of paper chosen was as per the box label, but as I was given the boxes of paper there is no certainty]. The paper was cut and loaded in a bedroom with closed curtains and an orange darkroom light. The only difference being that a new carpet had been laid in that bedroom. After wet chemistry processing the paper negative were scanned using a HP 3520 all-in-one printer.
Image01 and image02 (both infested with dark spots) were taken sequentially on a tide line with a gusty wind blowing at right angles to the camera line of view. Image02 is a small section of the full 4x5 positive – It is noticeable on this image that the “spots” are often in threes and a triangular pattern. In both cases the exposure was 1s and f11.
My camera is a Calumet CC 401 with long monorail. The lens is a xenar f4.7 135mm fitted with a 40.5 to 58mm ring onto which is screwed a 2x yellow filter and a lens hood.
Paper negative processing was as usual - Jobo tank and 2509 holder using Ilford PQ Universal developer [1m], Ilfostop [10s], and Ilford rapid fixer [1m].
I’ve thought up some scenarios, but would like feedback before I increase the number of variables by dismantling the apparatus or using a new of piece of paper
1] I’ve used a number of sheets of paper from the particular box of Ilford MGIV RC de luxe pearl – but there is always the possibility of a rogue piece of paper.
2] The apparent pattern of spots of image02 could be inferred as due to static from the new carpet.
3] Dust from cutting the 8x10 paper generates dust – could this be transferred to the DDS?
4] A windy, wild, wet, salt laden situation could put drops on the filter, but the spots seem to be much smaller than would be expected from water droplets.
5] Similarly it is unlikely that salt crystals on the filter would change their arrangement over the 10 minutes of so I was in front of the surging tide.
6] Dust within the bellows???
Any and all help welcome.
Regards
Tony