DANCHEK
24-Hour Acidity Tester

We have moved production to Spain and can offer attractive prices

One size only 1x4cm
and one price only
20 Euros = 250 pcs with printed color chart

Prices are including postage + banking charges.

Dancan Cinema Services S.L
Calle Explanada de Castillete 3 - X66
35138 Puerto de Mogan
Las Palmas de GC
España

Telephone +34 697 226 485
Contact: Morten Jacobsen

24-Hour Acidity Tester
This is a piece of dyed filter paper in actual size.It is a very sensitive indicator and senses the "Vinegar Syndrome" just by touching the film. The color is blue when in the pouch. After taking the wanted number of testers out of the pouch, squeeze the air out and close the pouch carefully.
Take the lid off your film can, place the indicator on the film and make a note of the time. The reading can be done after 24 hours depending on the temperature. For cold conditions expect 2-3 days for an accurate reading. 24 hours is based on 20 degree C.
Compare the reading with the color chart and make a note of the level of acidity.

If the color changes to olive green (pH 4,6) you have reached the critical autocatalytic point, which is the point where you should consider separating it from the rest of the collection and begin to duplicate. If the indicator has not reacted within 24 hours nothing is critical. If you leave the indicator in the open air it will fade.

Close contact with severely degraded acetate and nitrate films (touching and sniffing) may be a health hazard. Acetic acid and other acidic products emitted by degraded film have been known to produce contact burns, skin and mucous membrane irretations, and other physiological effects. Protective gloves and adequate ventilation are strongly recommended for handling degraded films.
(Safety note quoted from Image Permanence Institute in Rochester).

	Basic  Color	Color Change	Color Change	Color Change	Color Change	Color Change	Color Change
pH Value	at pH  Value 6,0	at pH Value 5,0	at pH Value 4,8	at pH Value 4,6	at pH Value 4,4	at pH Value 4,2	at pH Value <4,0
Danchek Acetate
Color	Blue	Blue	Greenish	Olive/ green	Yellow	Yellow	Yellow
Level	0	0	1	2	3	3	3
Smell	none	none	weak	stronger	strong	strong	strong
Condition	Fresh Film	Degradation is increasing	Degradation is more increasing	From now film should be |watched Autocatalytic Point	The film should be duplicated	The film has a very high priority for duplication	The film has a very high priority for duplication