very thin negs

[w rollinson]

its been a while since i last posted here but work has gotten out of hand so havnt done much in the way of photography. now i have a backlog of film, i got set out to develope last night so i loaded my reels with film 5 in all got everything to the right temps and mixed my developer which is 510 pyro and started developing . after fixing and washing all the films where very thin some hardly being seen .the films i loaded where two hp5 plus and three acros .i used 21 deg temp for 7 mins which is normal for me,the 510 pyro was 1:100 but it did look darker than i can remember, i used 15ml of 510 to 1500ml of water. the 510 is around 15 months old could this be a problem.i did some last month and the negs look mint i cant understand ,sorry for babbling on but its doing my head in and dont want to ruin anymore.any suggestions please ,thanks wayne

 

[removed account4]

hi wayne

were all your chemicals fresh ?

john

 

[w rollinson]

hi my 510 pyro concentrate was 15 months old but i made the 1:100 solution a couple of minutes before i used like i normally do my fixer was last used about 2 months ago.i use 510 pyro because i was under the impression it lasts a very long time in its concentrated form.i used the last of that last night so i need to make a new batch up and see if this makes a difference i have also chucked my fixer and will make up some more.also what i didnt mention before is the film has a pink tinge to it

 

[ic-racer]

Sounds like you are in a good position to really find out how long the concentrate will last. Make up some fresh and compare the two. My bet is that the old stuff has lost activity.

 

[w rollinson]

thanks i will give that a go when i first mixed up the 510 it was a golden brown and over time its darkened and when i mixed it to use it was very dark and i did think it was strange . i know i have used exact time temps and ratios as before so i can only think it could be the chemicals but just wanted clarification on what i had done as i have been second guessing myself.

 

[nze]

I had the same problem with PMk. I find that it cames from the alkali solution which get older quicker than the developer. I still use 8 years old PMK solution with good result. but for the metaborate solutio I prefer to dilute it just before use. I consider that it doesn' keep longer than 3 month.

Never use 510 but it seems that it is a ONe solution developer. You could try to test the PH of a fresh and old solution to see is something happen with time

 

[mikebarger]

I'm using 510 that is just over two years old with no problems.

Mike

 

[Jim Noel]

The deeper color of the 510 indicates to me that it has lost a lot of potency. Storage conditions vary and they have an effect on the life of developers.

 

[w rollinson]

thanks for all your posts ,i have just made a new batch so will give that a go ,and test the ph and let you all know ,cheers wayne

 

[w rollinson]

hi all i have just developed another film with the new 510 and everything is fine.i just did one film just to make sure i havnt done anything wrong but it looks good thanks all,wayne

 

[mikebarger]

Water in Hornsea must not be quite as pure as Missouri spring water

Mike