The rubber used on the top surface of some Wireless File Transmitter WFT-E7 B units produced between 9th April and 13th July 2012 may change colour (turn white) after a short period of time. After investigation and analysis with the rubber manufacturer, we have determined that zinc bis (N,N’-dimethyldithiocarbamate) is the substance that causes the rubber surfaces to turn white (see surface image below).
The amount of this substance that has been detected on any individual unit is minimal but in rare cases, depending on individual sensitivity, contact with this substance may cause an allergic skin reaction.
Only a limited number of the Wireless File Transmitter WFT-E7 B units that were produced between 9th April and 13th July are affected by this phenomenon.
The serial number of any unit can be used to identify whether it is affected by this phenomenon.
If the first two digits of the serial number are 03 through 06 and the fifth digit is 1, the unit is affected.
03xx1xxxxx, 04xx1xxxxx, 05xx1xxxxx, 06xx1xxxxx ([x] represents any optional number. )
Example of 10 digit serial number:
Please note that zinc bis (N,N’-dimethyldithiocarbamate) will not become deposited on the surface of units that were not produced in the designated production lots.
About Zinc bis (N,N’-dimethyldithiocarbamate)
Zinc bis is not used in the production of this product. However, the quantity of rubber accelerator used in the affected production lots was slightly higher than usual. As a result the rubber surface may turn white due to a chemical reaction with the rubber accelerator and other substances. High temperature and high humidity may contribute to this condition. Zinc bis (N,N’-dimethyldithiocarbamate), which becomes deposited on the rubber surface, is created as a result of this chemical reaction.
About any possible reaction
Although only a minimal amount of zinc bis (N,N’-dimethyldithiocarbamate) can be detected on any one single unit, when this substance is in contact with the skin, in rare cases and depending on one’s health and physical conditions, allergic skin reactions may develop. In addition, if eyes are rubbed with hands adhered with this substance, symptoms such as red eyes may develop.
As a precautionary measure, thoroughly wash your hands with water if they have come in contact with rubber parts that have turned white.
Allergic skin reactions
In the event that the substance in question is absorbed into the body through skin contact, it may invoke a sensitization response. If a sensitization response is induced, allergic skin reactions occur where the body may then overreacts to contact with the foreign substance. Please note that the occurrence of an allergic skin reaction on contact with this substance depends on length and type of contact with the substance, individual health and physical conditions, and individual skin sensitivity. Not everyone will be affected by allergic symptoms and the severity of any such allergic reaction will depend entirely on the individual.
If medical symptoms develop, please consult your physician.
We will provide a free repair service for all wireless file transmitters identifed as having been affected by this phenomenon. This free repair service will begin on 16 October 2012.
If your product is within the affected range, you are kindly requested to contact one of our authorised service facilities.
If you have any further enquiries please contact us using the e-mail support or telephone support option.
We offer our sincere apologies to customers who have been inconvenienced by this. Canon strives to provide the highest quality products to our customers, and we spare no effort in our quality management to make sure our customers use our products with confidence. We hope our efforts will earn your understanding.