Is this over or under exposed

drgoose · Nov 10, 2014

This is my first tintype. I have used the Rockland Tintype kit. This was exposed in open shade for one minute at 6.1 using a 210 mm lens. I think that it is overexposed but because this is a new process for ne I just want to check. What is the usual are you ISO for this type of emulsion?

Thanks in advace.
Joaquin

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shutterboy · Nov 10, 2014

Looks a bit over to me.

cliveh · Nov 10, 2014

I think you have answered your own question, as it is your image.

removed account4 · Nov 11, 2014

SNIP

drgoose said:
What is the usual are you ISO for this type of emulsion?

Thanks in advace.
Joaquin

View attachment 97662

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the iso of the emulsion sort of changes depending on the light conditions
it is sensitive to blue light, so certain times of the day there is more
blue light ... according to the rockland literature it is about iso 1

some say you can get a better idea of your light if you put a blue filter
over your light meter and set it to iso 1 ... it can be kind of tricky ...

jcc · Nov 12, 2014

Looks over-exposed. How long did you develop it?

hoffy · Nov 12, 2014

jnanian said:
SNIP

the iso of the emulsion sort of changes depending on the light conditions
it is sensitive to blue light, so certain times of the day there is more
blue light ... according to the rockland literature it is about iso 1

some say you can get a better idea of your light if you put a blue filter
over your light meter and set it to iso 1 ... it can be kind of tricky ...

I have seen this written in a few places. What shade of blue should be using? Does it really matter, as long as it's not a deep, dark blue?

monst · Nov 12, 2014

a test strip in the film holder is best to do. looks very over to me. meters are not much help in wet plate

removed account4 · Nov 12, 2014

hoffy said:
I have seen this written in a few places. What shade of blue should be using? Does it really matter, as long as it's not a deep, dark blue?

whenever i ask the same question i'm told it doesn't matter ... so i don't really know .. ( i never use the filter )
i just wing-it when i expose film and paper. i have over coated and exposed plates like this though.
but i have to admit one of the coolest things i have ever seen is a sort of thick coated plate's top layer peel away and dissolve
and an image magically appear underneath ..

Is this over or under exposed

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