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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: Black sharpie works just as well as special green pens posted by Elizabeth on June 26, 2010 at 06:41:18:
Thankyou for posters comments. Below is my post on avguide to Robert Harley on the subject.
Robert
I did a test for you. I had a CD that had previously been cleaned with Methanol (Lab Analysis Grade - leaves NO residue - hard to source btw) and its inner and edges heavily blackened - outer edge, wrapping around the edge as much as possible, inner edge and clear land around the centre hole, both sides blackened.
I demagnetized the CD and got a good fix on its sonics. Much of the printed side was then blackened (I used a Staedtler permanent marker /German/ the biggest I could buy with a 12mm felt ink 'tip' from a graphics supplier.)
There was a subtle but noticable difference - the music was more accessible, strings less clogged eg. The difference became more obvious after I demaged the fully inked disc.
I'd supposed the improvement was due to a reduction of laser scatter, with an increase in the S/N ratio of the HF RF stream coming off the disc.
(Why didn't I start with an unblacked disc you ask: I'd sometime ago satisfied myself blackening the edges and cental land is beneficial.)
So blacking CDs makes a difference ? Yes
Worth it (for a portion of my discs ) ? Yes
For everybody ? No too messy / black fingers.
Is green better: don't know, being a cheap skate - black is supposed to absorb all frequencies and much cheaper.
Better still is the Audio Desk CD lathe/ trimmer (plus blackening). It makes a more fundametal difference.
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Follow Ups
- RE: Black sharpie works just as well as special green pens - John V 15:02:27 06/28/10 (0)
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