[Tig] Dust and telecine

[Hugh Waters]

To which I'd add:

Encourage the use of lint-free clothing in the clean room. Dust doesn't just
only arrive by air, some is generated by the act of using the machine by the
operator. Massive amounts of dust come from skin and clothing, so if you
can't persuade your ops to wear masks and gloves (and I'm not joking)
certainly consider at the least a lint-free operating coat or, better still,
cleanroom overalls. People with dry skin generate dust simply standing
still. Allow them to move and clouds of dust appear (relatively speaking)!

Especially in flat bed scanning rooms where films may be moving very slowly
I'd also specify a cleanroom filter system providing a wash of highly
filtered air over the scanner and make sure you control the humidity in the
room. These can seem expensive but where it isn't practical to have a fully
pressurised room, getting a clean positive flow over the most sensitive area
is a start.

Again considering generation of dust and particles, consider how paperwork
is handled near the neg, how the cans are opened and where and the film cans
or cardboard boxes are stored. Ideally large consignments of neg in boxes
shouldn't find their way into the scanning room waiting to be scanned. When
a box is opened veritable clouds of particles are freed into the circulating
air.


Hugh
-----------------------------
Hugh James Waters
Waters Technical Services
07801 053248
01453549048
hugh at hjwaters.co.uk
www.hjwaters.co.uk


-----Original Message-----
From: tig-bounces at tig.colorist.org [mailto:tig-bounces at tig.colorist.org] On
Behalf Of Rob Lingelbach
Sent: 22 August 2006 16:54
To: Andreas Wideroe Andersen
Cc: tig at tig.colorist.org
Subject: Re: [Tig] Dust and telecine


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On Tue, August 22, 2006 12:19 pm, Andreas Wideroe Andersen wrote:
> Just out of curiosity, what does your company do
> to prevent (or try to prevent) dust from sneaking
> onto films in your telecine machine?

#1: positive airflow.  keep that air a-coming from the vents in your
telecine so that dust goes _out_ the doors instead of in.

#2: PTRs.  if you aren't familiar with them talk to a supplier. 
They are the single most effective tool in dust control I've ever come
across.  Won some kind of award I think.

#3: cleanliness, and good negative handling.

#4 (and this is somewhat deprecated) sticky mats outside the entry doors to
the machine room.

Rob
-- 
Rob Lingelbach
http://www.colorist.org/robhome.html

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