arjen van de merwe Posted January 26, 2012 Share Posted January 26, 2012 <p>I have a multiblitz striplight. the front cover has yellowed over time, giving yellowish light in stead of white. carefully washing it does not help. it has a label saying: PROREC 35 (i think, the label has also faded) does someone have experience with this material? could I use bleach safely?</p> Link to comment Share on other sites More sharing options...
rodeo_joe1 Posted January 26, 2012 Share Posted January 26, 2012 <p>Have you tried a biological washing agent? The material is likely to be Nylon or Polyester, so bleach should be safe provided it's well rinsed out afterwards.<br> However, I think most decent softbox diffuser fabrics are treated with a flame-retardent chemical that will probably wash out. I would be careful of using a laundered diffuser with hot lights or with a powerful modelling light. And more to the point, can you really see any differennce in the pictures between a fresh and slightly aged diffuser? Wouldn't it just be easier to tweak the white balance a bit?</p> Link to comment Share on other sites More sharing options...
arjen van de merwe Posted January 26, 2012 Author Share Posted January 26, 2012 <p>It is clearly visible: there is a difference in colour temperature between this light and my other lights.<br> I have tried a common white wash detergent, and that did not work. I am afraid bleach is my only option. The material feels a bit like nylon sails for a sailing boat but then thinner.</p> Link to comment Share on other sites More sharing options...
fotografz Posted January 26, 2012 Share Posted January 26, 2012 <p>They yellow with age. Bleach or color safe bleach does nothing for some reason. Maybe it has something to do with prolonged exposure to the environment, and modeling lights?</p> <p>Most of the time you can just CC the photo ... as long as all of the diffusers you are working with are relatively the same age. </p> <p>I just washed my 5' Profoto outer diffuser 4 times using bleach ... to little effect.</p> <p>So, I asked this question of a studio tech friend that works in a big pro studio, and he has never heard of anyone solving the issue (not that there isn't one, just no-one seems to know of one).</p> <p>His suggestion was to simply replace it for color critical product work and keep the yellowed one for portrait photography : -)</p> <p>-Marc</p> <p> </p> Link to comment Share on other sites More sharing options...
eric_m4 Posted January 30, 2012 Share Posted January 30, 2012 <p>Hi Arjen,</p> <p>Is it possible the manufacturer sells the front cover as a separate accessory? On my soft box the front cover is held on by velcro.</p> Link to comment Share on other sites More sharing options...
marcus_boyd Posted September 15, 2013 Share Posted September 15, 2013 <p>Hello Arjen,<br> I recently bought two 5-bulb softboxes of craigslist. It didn't have the yellow you were speaking about, but it did have a lot of brown spots on the front diffusers and inner diffusers. I handwashed mine with warm water and Hydrogen Peroxide 50/50. It brought them back whitel again. I hope this helps!</p> Link to comment Share on other sites More sharing options...
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