Ueee
18th August 2012, 07:37 PM
Hi,
rather than tacking this onto the end of Marks thread here: http://www.woodworkforums.com/f65/whats-good-material-making-round-knobs-154846/ I thought i would start a new thread.
On Wednesday i set to casting some knobs for Freddies table support adjustment handles and i would make some spare knobs and rod while i was at it.
I used Diggers brand casting resin and black oxide from Bunnings.
I mixed up 300g of resin and 100g of oxide. The mix was not quite the honey that Mark describes, but it was certainly "peaky". It been pretty cold here, well it was cold during the week but freezing yesterday (like 3 deg at 10am) and today, so i went for the recommended cold weather mix-2.5ml per 100 grams- that worked out to be 450 drops of catalyst- but i run out at 400 :((.
Now for the problem....80 odd hours later the mix is still tacky....overnight and i could have (slowly) pored the mix out of the molds. ###:? The resin was less then a month old, i thought i used plenty of catalyst, but no success. No spare toaster oven to be had.....and my only other option is my heated seedling tray.......which is full of seedlings right now:doh:.
Not sure what went wrong....i just hope that they end up hard enough to use eventually.
http://i1151.photobucket.com/albums/o622/ueee84/IMAG0915Large.jpg
http://i1151.photobucket.com/albums/o622/ueee84/IMAG0917Large.jpg
And lastly, just to show you how cold it is here....Arthur and i went for a drive today, to about 1200m altitude (1/2 hour from home)....froze our, um, well not our resin balls off!
http://i1151.photobucket.com/albums/o622/ueee84/IMAG0927Large.jpg
rather than tacking this onto the end of Marks thread here: http://www.woodworkforums.com/f65/whats-good-material-making-round-knobs-154846/ I thought i would start a new thread.
On Wednesday i set to casting some knobs for Freddies table support adjustment handles and i would make some spare knobs and rod while i was at it.
I used Diggers brand casting resin and black oxide from Bunnings.
I mixed up 300g of resin and 100g of oxide. The mix was not quite the honey that Mark describes, but it was certainly "peaky". It been pretty cold here, well it was cold during the week but freezing yesterday (like 3 deg at 10am) and today, so i went for the recommended cold weather mix-2.5ml per 100 grams- that worked out to be 450 drops of catalyst- but i run out at 400 :((.
Now for the problem....80 odd hours later the mix is still tacky....overnight and i could have (slowly) pored the mix out of the molds. ###:? The resin was less then a month old, i thought i used plenty of catalyst, but no success. No spare toaster oven to be had.....and my only other option is my heated seedling tray.......which is full of seedlings right now:doh:.
Not sure what went wrong....i just hope that they end up hard enough to use eventually.
http://i1151.photobucket.com/albums/o622/ueee84/IMAG0915Large.jpg
http://i1151.photobucket.com/albums/o622/ueee84/IMAG0917Large.jpg
And lastly, just to show you how cold it is here....Arthur and i went for a drive today, to about 1200m altitude (1/2 hour from home)....froze our, um, well not our resin balls off!
http://i1151.photobucket.com/albums/o622/ueee84/IMAG0927Large.jpg