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how to clean filters?


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Mar 22, 2005
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#21
mervlam said:
never use tissue or those paper towels. they scratch. you should use microfibre cloth like those used for glasses.
Actually i dun get why tissue paper scratch when glass is harder than tissue paper (presuming it is a coatless filter).In Moh's scale, we know that diamond is the hardest and can scratch anything. And in this case, glass is harder than tissue paper. So how can tissue paper scratch glass?!
 

i120D

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Jan 12, 2005
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#22
tissue paper will not scratch glass, but dirt (e.g. sand) will scrath if fall between your tissue paper and glass
 

Shodan99

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Nov 5, 2004
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#23
True.. sharp edges in sand actually produces a very high stress concentration during surface contact that is capable of scratching the surface of glass.

If you do a google search on tribology will yield some boring theory of friction and wear of surfaces...
 

Mar 22, 2005
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#24
Thanks... So if there is no dirt (presuming there's also no micro dust), the glass of the filter wont be scratched?
 

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