Once upon a time on usenet Phil Allison wrote:
~misfit~ wrote:

--------------------



Actually CDRs are much less reflective than 'pressed' CDs and as
such some older CD players don't have the laser power needed to
get a good (reflected) signal.


** CDRs use the same metallised ( Gold or Silver) reflecting layer
as a normal CD.



Yes. The difference is in the construction of the non-refecting
areas.


** Shame how that admission completely removes your original claim.

I didn't think that you were going to split hairs.


** And I'm not.



In a
CD they're pressed into the refecting later and become 'pits'



** Pits come first, reflective metallisation comes afterwards.

The whole game is wavelength dependant.

Perhaps with blu-ray it is but not so much with CDs as the dark and
light areas are large enough for any wavelength to read you moron.


** Pressed CDs do not have dark and light areas.

The pits are exactly 1/4 wave deep the 780nm IR wavelength used - the
IR laser light travels and extra half wavelength causing self
cancellation.

Go look it up.

All good I'll take your word for it. So it's even more 'black-and-white'
w/r/t reflections than I thought with a pressed CD.

whereas with a
CDR a dye layer between the reflecting area and the pickup laser is
'burned' changing it's reflectivity index.



** The dye simply becomes opaque.

Which is a ****wit way of saying it's reflectivity index or ability
to transmit light has changed.


** Remember posting this?

" Actually CDRs are much less reflective than 'pressed' CDs and as
such some
older CD players don't have the laser power needed to get a good
(reflected)
signal. "

Yep, and I stand by it. Notice I said "CDRs..." and not 'the metallised
layer inside CRDs...'?

In fact you've just told me that the whole of the underside of pressed CDs
is reflective, just that part is 180º out of phase with the rest when read
with a CD laser. That's certainly not the case with CDRs.

You are just making " facts " up as you go.

A process called "confabulation".

A euphemism for bull****ting.

I see you're back to your MO of trying to be so obnoxious as to
scare others off so you can have the last say. Funny how it always
happens in the evening


** The one being obnoxious here is you - pal.

Not exactly true but, if it was, it would make a change eh?
--
Shaun.

"Humans will have advanced a long, long way when religious belief has a cozy
little classification in the DSM*."
David Melville (in r.a.s.f1)
(*Diagnostic and Statistical Manual of Mental Disorders)