Comments on: Playing with polyurethane casting material http://tim.cexx.org/?p=448 the noise floor Thu, 10 May 2012 21:26:29 +0000 hourly 1 http://wordpress.org/?v=3.3.2 By: Paramesh http://tim.cexx.org/?p=448&cpage=1#comment-73312 Paramesh Wed, 23 Nov 2011 04:38:28 +0000 http://tim.cexx.org/?p=448#comment-73312 nice and cool nice and cool

]]> By: Top 30 LED DIY Projects! http://tim.cexx.org/?p=448&cpage=1#comment-28857 Top 30 LED DIY Projects! Fri, 09 Oct 2009 00:11:04 +0000 http://tim.cexx.org/?p=448#comment-28857 [...] More cool ice-cube LED lamps – These could look really good on your porch.  Better yet, couple it with some solar panels [...] [...] More cool ice-cube LED lamps – These could look really good on your porch.  Better yet, couple it with some solar panels [...]

]]> By: Bob http://tim.cexx.org/?p=448&cpage=1#comment-19776 Bob Thu, 13 Nov 2008 07:44:50 +0000 http://tim.cexx.org/?p=448#comment-19776 Tim's report was very informative and amusing. Photos were useful. I'm just starting to play with the poly rubber stuff from this company. Thanks. Tim’s report was very informative and amusing. Photos were useful. I’m just starting to play with the poly rubber stuff from this company. Thanks.

]]> By: Adam http://tim.cexx.org/?p=448&cpage=1#comment-16431 Adam Mon, 30 Jun 2008 14:56:52 +0000 http://tim.cexx.org/?p=448#comment-16431 The melty ones are neat! If I had to guess at what happened, I would say the mix was too heavy on the "Part A". If you think there is a chance you mixed it 100B:150A, that would certainly explain it. Unreacted diisocyanate will react with moisture in the air with CO2 as a byproduct (hence, bubbles). The melty ones are neat! If I had to guess at what happened, I would say the mix was too heavy on the “Part A”. If you think there is a chance you mixed it 100B:150A, that would certainly explain it. Unreacted diisocyanate will react with moisture in the air with CO2 as a byproduct (hence, bubbles).

]]> By: DIY - How to Make LED Cubes! | zedomax.com - Obsessively profiling DIYs, Hacks, Gadgets, Tech, Web2.0,and beyond. http://tim.cexx.org/?p=448&cpage=1#comment-15713 DIY - How to Make LED Cubes! | zedomax.com - Obsessively profiling DIYs, Hacks, Gadgets, Tech, Web2.0,and beyond. Tue, 20 May 2008 04:50:07 +0000 http://tim.cexx.org/?p=448#comment-15713 [...] Wow, here’s a really creative way of making your own LED cubes! The material used is Smooth-On brand “Clear Flex 95″. This is mainly sold as an industrial product, although smaller quantities (highly recommended! See below for why) may be availble from art supply houses. It comes in 2 separate jugs of syrupy liquid marked PART A and PART B, which are mixed together in a specific ratio by weight. [...] [...] Wow, here’s a really creative way of making your own LED cubes! The material used is Smooth-On brand “Clear Flex 95″. This is mainly sold as an industrial product, although smaller quantities (highly recommended! See below for why) may be availble from art supply houses. It comes in 2 separate jugs of syrupy liquid marked PART A and PART B, which are mixed together in a specific ratio by weight. [...]

]]> By: Miranda http://tim.cexx.org/?p=448&cpage=1#comment-15707 Miranda Mon, 19 May 2008 19:11:47 +0000 http://tim.cexx.org/?p=448#comment-15707 That is so awesome! I love the melty ones. They do look badass! That is so awesome! I love the melty ones. They do look badass!

]]> By: Anon http://tim.cexx.org/?p=448&cpage=1#comment-15695 Anon Sun, 18 May 2008 15:14:09 +0000 http://tim.cexx.org/?p=448#comment-15695 If the curing agent is isocyanate (which should be listed on the MSDS) than the curing agent had probably already partly reacted to moisture and/or alcohol which slowed the intended cure. If that is the case, you only need "fresh curing agent" to replace the old stuff. In any case, remember to keep moisture and alcohol away from curing agents since they can make them go bad by chemically reacting to them. If the curing agent is isocyanate (which should be listed on the MSDS) than the curing agent had probably already partly reacted to moisture and/or alcohol which slowed the intended cure. If that is the case, you only need “fresh curing agent” to replace the old stuff.

In any case, remember to keep moisture and alcohol away from curing agents since they can make them go bad by chemically reacting to them.

]]> By: LED stalactites? » Developages - Development and Technology Blog http://tim.cexx.org/?p=448&cpage=1#comment-15658 LED stalactites? » Developages - Development and Technology Blog Thu, 15 May 2008 23:46:51 +0000 http://tim.cexx.org/?p=448#comment-15658 [...] After some unsavory reaction in a plastic mold tray, he left the resulting mutant to hang dry for a few days. After finally hardening, he found himself the proud owner of the specimens seen above. - Playing with polyurethane casting material [via Ladyada’s ranting] [...] [...] After some unsavory reaction in a plastic mold tray, he left the resulting mutant to hang dry for a few days. After finally hardening, he found himself the proud owner of the specimens seen above. – Playing with polyurethane casting material [via Ladyada’s ranting] [...]

]]> By: LED stalactites? | Tech-Mania Revolution! http://tim.cexx.org/?p=448&cpage=1#comment-15654 LED stalactites? | Tech-Mania Revolution! Thu, 15 May 2008 23:31:38 +0000 http://tim.cexx.org/?p=448#comment-15654 [...] A funny thing happened to Tim's LEDs while attempting to cast them in resin - For a project at work I had to mold some things in this hard clear polyurethane, so my Mechie ordered a giant kit of the stuff - more than the project ever will need (and it has a very limited shelf life). So I mixed up a little more than necessary and used the leftover to pot some LEDs. After some unsavory reaction in a plastic mold tray, he left the resulting mutant to hang dry for a few days. After finally hardening, he found himself the proud owner of the specimens seen above. - Playing with polyurethane casting material [via Ladyada's ranting] [Read this article] [Comment on this article] [...] [...] A funny thing happened to Tim’s LEDs while attempting to cast them in resin – For a project at work I had to mold some things in this hard clear polyurethane, so my Mechie ordered a giant kit of the stuff – more than the project ever will need (and it has a very limited shelf life). So I mixed up a little more than necessary and used the leftover to pot some LEDs. After some unsavory reaction in a plastic mold tray, he left the resulting mutant to hang dry for a few days. After finally hardening, he found himself the proud owner of the specimens seen above. – Playing with polyurethane casting material [via Ladyada's ranting] [Read this article] [Comment on this article] [...]

]]> By: ladyada’s ranting » Blog Archive » Melty-cube LED casting http://tim.cexx.org/?p=448&cpage=1#comment-15642 ladyada’s ranting » Blog Archive » Melty-cube LED casting Wed, 14 May 2008 15:06:52 +0000 http://tim.cexx.org/?p=448#comment-15642 [...] Tim has a lovely blog (build-log!) of a wearable tricolor LED project. I liked the images of his attempt to cast them using ice cube trays. You can see the first two turned out very nicely and the remaining ones are kind of blobby. This particular effect is accidental, caused by a bubbling/melting of the casting compound. Still, it looks rather neat. You can also, of course, make a nice mold out of milled aluminum…. [...] [...] Tim has a lovely blog (build-log!) of a wearable tricolor LED project. I liked the images of his attempt to cast them using ice cube trays. You can see the first two turned out very nicely and the remaining ones are kind of blobby. This particular effect is accidental, caused by a bubbling/melting of the casting compound. Still, it looks rather neat. You can also, of course, make a nice mold out of milled aluminum…. [...]

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