On 23/03/2017 15:36, Graham P Davis wrote:
On 23/03/17 13:42, Freddie wrote:
On Thursday, 23 March 2017 12:28:31 UTC, Graham P Davis wrote:
we had special plotting pens having a single (red) handle with two
nibs. I think they were of German design - or so I was told.

Oh wow, I've never heard of those before! I was one of those who
used biros taped together to plot the European chart as far east as
there was data available (Wyton) and used to stick the Molfax wet fax
chart to a larger North Atlantic paper chart and plot the ships :-)


When I was at Wyton, the used Molfax charts were stored in a cupboard
under the forecasters bench. The office had been painted a year or two
earlier, and yet the paint in the cupboard was still wet due to the
action of the chemicals in the fax paper.


As a paint chemist I would be interested to know what the paint was and
what the chemicals were. I've never come across such a drying retarding
effect before!

--
Col

Bolton, Lancashire
160m asl
Snow videos:
http://www.youtube.com/channel/UC3QvmL4UWBmHFMKWiwYm_gg