tag:blogger.com,1999:blog-5684277511053973833.post7782530549699465587..comments2023-11-26T17:19:22.499+00:00Comments on RAMBLES FROM MY CHAIR: Purple pencilsScriptor Senexhttp://www.blogger.com/profile/17795521284516432520noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-5684277511053973833.post-17880994267339436872008-02-05T18:00:00.000+00:002008-02-05T18:00:00.000+00:00As soon as I saw this posting I was reminded of in...As soon as I saw this posting I was reminded of indelible pencils which were used extensively when I was a child - and, indeed, a lot later as well. I think I still have one or two. They were used primarily for marking the clothes and so on that went to the laundry. I think that the Police also used them for their notebooks. They took on a brighter purple hue when moistened and became indelible - hence the reason Policement are seen licking their pencils when writing in their notebooks in old films.<BR/><BR/>I think that the following might be relevant websites:<BR/><BR/>http://www.todayinsci.com/Events/Patent/IndeliblePencilPatent56180.htm<BR/><BR/>http://aic.stanford.edu/sg/bpg/annual/v17/bp17-05.htmlGBhttps://www.blogger.com/profile/10289400344300258872noreply@blogger.com