andre_belokon

<p>Formulas<br>

ascorbate version:<br /> Sodium Sulfite 60g<br /> CD-1 2g<br /> Sodium Ascorbate 5g<br /> Kodalk 7g<br /> Water 1l<br /> <br /> CD/Q version:<br /> Sodium Sulfite 100g<br /> CD-1 5g<br /> Hydroquinone 6g<br /> Borax 6g<br /> Boric Acid 4g<br /> Water 1l</p>

<p>Last month I was make some experiment with different formulas like Atomal/Calbe A49. I use CD-1 because it available in my country. I'm really impressed with results. Some samples:<br>

CD-1 + Ascorbate + Kodalk, Ilford HP5+ @400<br>

<img src="http://img146.imageshack.us/img146/1010/img0084bw010.jpg" alt="" /><br>

<img src="http://img843.imageshack.us/img843/4741/img0084bw0102.jpg" alt="" /><br>

CD-1 + Hydroquinone + Borax, Ilford HP5+ @400<br>

<img src="http://img857.imageshack.us/img857/8238/imgtst009016.jpg" alt="" /><br>

<img src="http://img17.imageshack.us/img17/1674/imgtst0090162.jpg" alt="" /><br>

<img src="http://img641.imageshack.us/img641/598/imgtst0090161.jpg" alt="" /></p>

<p>Problem of make fogging dev/batch with Stannous Chloride is that solution is very unstable and can't be keep for long time. After some experiment I was found very simple solution for fogging developer. 1st make SnCl concentrate:<br /> <br /> Glycol ... 100ml<br /> Stannous Chloride ... 5g<br /> <br /> Stannous Chloride can't dissolve in glycol, but after mix you have some solution like milk.<br>

One-shot fogging developer:<br /> SnCl concentrate ... 10ml<br /> Rodinal ... 10ml<br /> Water ... 300ml<br /> <br /> mix before use. don't keep. after bleach process film in fogging dev 2-3min with intensive agitation.<br /> or you can try other formula without Rodinal<br /> <br /> SnCl concentrate:<br /> Glycol ... 100ml<br /> Phenidone ... 1g<br /> Ascorbic Acid ... 10g<br /> Stannous Chloride ... 5g<br /> <br /> dissolve phenidone and ascorbic acid in glycol, add SnCl and mix. working solution of one-shot fogging developer:<br /> <br /> SnCl concentrate ... 10ml<br /> NaOH 5-10% ... 10ml<br /> Water ... 300ml<br>

usage - same as Rodinal version<br>

All steps for make bw-slides:<br>

1) 1st developer<br /> 2) bleach<br /> 3) fogging developer (SnCl+Rodinal)</p>

<p>I have very good results from HP5+ processed in lazy-split D76. Put film into D-76d (modification of D-76 with Boric Acid) for 5min 21C, after this put film into 2nd batch with Sodium Carbonate 5-10g/l + Sodium Sulfite 30g/l. make very slow agitation in 2nd batch. after 3min in 2nd batch stop and fix. Advantages of this solution is the fine grain as in D-76, but sharpness and low contrast as in D-76 1+1<br>

2nd batch can be modifien as<br>

1) 10g/l Borax + Sulfite for fine grain<br>

2) 10g/l Trisodium phosphate + Sulfite for extra sharpness<br>

PS I also develop Tri-X 400 and TMAX400 same as HP5+ with very good results</p>

<p>Jay, Murray,<br>

formula of PQ developer for Imagelink HQ reminded me some other receipt for high-contrast technical film. <br>

Phenidone 1g<br>

Hydroquinone 2g<br>

Sodium Sulfite 30g<br>

Sodium Carbonate 10g<br>

KBr 1g<br>

Water 1l<br>

I found this formula in patent US4205124 "Low gamma photographic developer". I was modify it with added some KBr. This is very active developer. I'm need only 2min for developing PolypanF 50 with push +1 with acceptable contrast</p>

<p>Jay,<br>

I haven't PPD base, only PPD.2Cl. no problem to make PPD base: 18.1g of PPD.2Cl + 8g of NaOH = 10.6g of PPD base. so I will try this receipt, because have very good experience with other PPD-based developer - Meritol-Metol. HP5+@400 15min produce very fine negatives with grain and contrast less than in D76 stock<br>

<img src="http://img28.imageshack.us/img28/7804/img0068003.jpg" alt="" /></p>