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Old 15th February 2009, 10:09 AM
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Default dust and glass

A tip for identifying dust on glass negative carriers:

When using glass neg carriers, I put enlarger lamp on and open up aperture. With nothing on baseboard on no neg in carrier, I slide neg carrier in and out of enlarger looking at baseboard. If there are any specs of dust on glass, you can see them moving on baseboard as you slide the neg carrier in and out.
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Old 15th February 2009, 10:37 AM
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Originally Posted by percepts View Post
A tip for identifying dust on glass negative carriers:

When using glass neg carriers, I put enlarger lamp on and open up aperture. With nothing on baseboard on no neg in carrier, I slide neg carrier in and out of enlarger looking at baseboard. If there are any specs of dust on glass, you can see them moving on baseboard as you slide the neg carrier in and out.
Sounds a good idea, I shall try it later. Presumably it needs to be approximately focused?
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Old 15th February 2009, 11:36 AM
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Sounds a good idea, I shall try it later. Presumably it needs to be approximately focused?
focussing will help but of course it depends which surface the dust is on.
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Old 15th February 2009, 09:08 PM
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Anyone ever see those little dust mites moving on the glass negative carriers. What are those guys living on?
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Old 15th February 2009, 09:46 PM
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Anyone ever see those little dust mites moving on the glass negative carriers. What are those guys living on?
Your negatives!
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Old 15th February 2009, 09:51 PM
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Anyone ever see those little dust mites moving on the glass negative carriers. What are those guys living on?
Your dead skin cells mainly...

And, before someone tells us that "most of the dust in your house is dead skin cells", it ain't. Urban myth. Dust is mainly just that: dust. Mostly fine soil and vegetation and brick and concrete, plaster and wood dust depending on where you live. Only a tiny amount is of human origin (something like 2% IIRC).

It was a question on QI some time ago. Alan Davies collected the inevitable -20 points...
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Old 15th February 2009, 10:42 PM
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Anyone ever see those little dust mites moving on the glass negative carriers. What are those guys living on?
dust?
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