Chris
No need to spray the back. Just use hair spray for oily hair - it=20
contains no  oil particles which cause the blotchy look and can obscure=20=

the first arrival.
Cheers
Kevin

On 27/09/2005, at 2:12 AM, ChrisAtUpw@....... wrote:

> In a message dated 26/09/05, ivey@.......... writes:
>
>
>
>  Hi there,
>
>  =A0=A0=A0=A0=A0=A0It is quite easy to make a lamp with a pickle jar, =
a metal lid,=20
> some metal tube, a wick and paraffin, to smoke paper. You clip the=20
> paper tightly onto the drum and rotate the whole thing over the smoky=20=

> flame, till you get an even, totally black cover. The presence of the=20=

> metal backing drum stops the paper from catching fire. When the trace=20=

> is complete, you very carefully remove the paper and SPRAY THE BACK=20
> SIDE OF THE PAPER with hair lacquer, so that it is wet right through.=20=

> When this has dried, you can also spray the front of the trace. If you=20=

> try to just spray the front of the trace, a lot of the carbon blows=20
> away and you get a blotchy, uneven result. You get a much higher=20
> resolution from this type of trace than from an ink pen.
>
>  =A0=A0=A0=A0=A0=A0Regards,
>
>  =A0=A0=A0=A0=A0=A0Chris Chapman
Kevin McCue
Director
Australian Seismological Centre
PO Box 324 Jamison Centre
ACT 2614
Australia
ph: 61 (0)2 6251 1291

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