Recent content by ludwik

I wonder if there is an alternative to Iron Out? From its datasheet ingredients: Citric Acid 1 - 5% Sodium carbonate 10 - 30% Sodium hydrosulfite 15 - 40% Sodium metabisulfite 10 - 30% Sodium sulfite 1 - 5% I actually have all of the above chemicals just wonder what would be the best...

hello darkness my old friend i've come to talk with you again...

Yea. Erythrosine can be a part of formula. I read that bath is as effective as adding dye to the emulsion (bromide can suppress effect of erythrosine) specially for non ammonia formulas. Another thing, for a first batch is better if done without it anyway. test for fog, cover glass plates, test...

Try this: A. Salts solution Distilled water – 100ml Potassium bromide – 12g 10% solution of Potassium iode – 5ml Gelatin – 2.5g B. Silver solution (room temperature) Distilled water – 100ml Silver Nitrate – 10g C. Gelatin Gelatin – 12.5g D. Sulfur sensitizer sodium thiosulphate...

As I read about all of it then amounts of every thing depends on mole, grain sizes etc. too many variables. Is there a simple formula I could follow? (like for 400ml of emulsion use x grams of thiosulfate) so maybe it wont be perfect but will jump emulsion from basic ISO 2 to maybe ISO 10? 20? I...

For 8x10 (or 18x24cm) I use glass scavenged from faulty canon printers (scanners) - it is 3mm but I can fit that easily to the holders I have. for smaller (4x5 or 9x12cm) I just got 2mm glass from glass maker found online. If you cut glass get sharpening stone and grind edges. Saves you a lot...

Collodion is sensitive to UV and visible blue spectrum. I wonder why people bother to use thousands of Ws flash lights if collodion will "see" only a fraction of it and flash itself is only 1/8000th of a second or so... blue LED light - like royal blue (450-465) + Ice blue (470-475nm) should be...

How do you know that enough is enough? on your sample last strip is the one when you stopped?

I know its an old topic. Photo engineer mentioned blotter test for fog every 10 minutes, stop when fog is noticed. I'm new to this stuff (just do basic emulsion for now). and this maybe a stupid question - how the fog look like?

I'm reading it now. (fortunately there is an online version so I dont have to wait for it) at the start I will go with this simple recipe and then the one from this topic. 10 times higher ISO is very tempting.

For start I would like something that just works... an average emulsion that will be first step in this journey - something useful to make me shout: ITS ALIVE!!! a good starting point to improve and experiment with textbooks etc.

In few places there is a something per mol of silver. (I'm beginner in this things) How to calculate it? Can you make example using recipe from first post? Another question. reading a lot about the process I've seen someone adding silver nitrate from one syringe and bromides and iodides from...

"Normal" Ireland... hard to get anything in here... anyway. I will find something. (cd3 I found was about 30 cents per 1g - thats why I asked)

forums seems to move over to facebook - its fine for some discussions and up to date things but if you want to find some useful info is pain in the bottom. Forums are way better

ok. so need to find cd4.