Surprising that the acrylic paint worked. You normally wouldn't want anything containing water mixed in with your polyurethane. It usually creates bubbles. To get consistent results when mixing small batches of resin use a scale instead of by volume. You need to do some math to work out the specific gravity and ratio for the components but often this can be found in a datasheet. Just using one cup when measuring out the parts, makes it more precise still since quite a lot can cling to a cup when pouring it resin in to another. Less great for an explanatory video though. Good work on these, it's cool to see resin being used in a functional manner. Just don't go to to far into the glittery dark side :)
Thanks for the tip! I've tried doing some mixing by weight, but I think I need a more accurate scale, so I've got some digging to do. I was a little surprised by the acrylic too, and I've been getting recommendations for other pigments to try so maybe another set of tests is in order
I think you are right. None worked on my urethane resin ball plug for bowling ball. I was teying to save money anything bowling related is expensive lol. I'll order some mica powder and see if it will work
Nice one. Mixing A-B is usually best done by weight. Another good trick for really small tests is to use a syringe to meter out volume. Ratio=super important
Came across your video for info on tinting polyurethane wood finish. One thing Im considering that you didnt try is plain old food coloring from the cake decorating aisle.
I'm trying this later this week. All I could find was gel food coloring. Not sure how that differs from the regular stuff I used to see but I'm going to test it as a wood finish. both straight on the wood and mixed into oil based polyurethane. I assume the colorants are water based and that they have the glycol to help them mix with oils but I can't be sure. I guess I'll find out.
if the ratio has to be perfect, you can't measure using the same height in a conical cup, the volume is different and in a small batch, that's amplified.
I used urethane resin bowling ball plug to fill in some holes and I tried the acrylic paint food coloring and both tried in size over flowing the holes had to drill out idk why it worked on yours maybe the pressure pot? The bowling ball plug colors are expensive as is the ball plug. I wonder if I should order the stuff you are using and test it out on an old bowling ball
I'm trying to tint my polyurethan rubber mate grey, but i cannot succeed. I tried pigments, acrylic paint, and even graphite powder. Some acrylic seemed to tint it a bit before pouring (but I had to use a lot), but when curing it went back to dark brown, like the normal urethane. I don't know what to do :(
Dyeing wheels that have already been cast is a whole 'nother art and one that I haven't experimented with yet. Looking forward to giving it a shot, especially if I can find some white urethane!
So I’m trying to color smooth on vyta. Any one know what else to use? I know it cures white and I’m trying to make it silver. Would acrylic paint work?
Nice video! My advice, get a gram scale (jeweller's scale), this way you can get super accurate ratios even if you do small pours. Also, my experience is that anything containing water (fabric dye, acrylic ink, acrylic paint, etc) will cause the urethane to bubble. I think the only thing that saved your acrylic paint tests in this case was the pressure pot. Some urethanes are more sensitive than others, for example I have a water clear acrylic that bubbles if you look at it skew.
Maybe the failure is due to the water soluble nature of the dyes? Don't know, but I'm fairly sure that Rit dye is water based. Interesting stuff though. And subbed too. Thanks mate.
That's EXACTLY it. Urethane is made from a polyol and isocyanate mixed together. Isocyanate also cures when exposed to water, but in that case the polyol doesn't get consumed and the byproduct of isocyanate and water is a ton of CO2 gas, which causes bubbling or if you're using water-based dyes enough bubbles to basically become a foam. Some polyurethane foams are actually made using water as a foaming agent.
Huh. When I mixed acrylic paint with Flex-It 90, it was a complete disaster. It bubbled and frothed right out of the mold, like a witch's brew oozing out of the pour spout and air vents. It was BAD!
Have you experimented with dyeing after your casted urethane has already cured ? : ie dye white or clear bushings or wheels after they have been made and cured.
@@GoodRoads I have a question. I’m thinking of dyeing wheels a navy blue but I don’t know which color wheel would work best. Perfect scenario would be a white wheel but I don’t have. It’s either a clear yellow or clear green like a teal color. Which would get me a better navy if I dye with blue?
You'll be able to get a deeper blue with the amber / yellow urethanes. The urethanes that cure white are very hard to get dark colors with because whatever pigments you add to the urethane is effectively getting mixed with white. The amber color of the clear urethanes will effect the blue and pull it towards a green a little bit, but you can still get really nice results.
This is awesome.
So informative.
Answered questions I didn't know I'd have.
Surprising that the acrylic paint worked. You normally wouldn't want anything containing water mixed in with your polyurethane. It usually creates bubbles. To get consistent results when mixing small batches of resin use a scale instead of by volume. You need to do some math to work out the specific gravity and ratio for the components but often this can be found in a datasheet. Just using one cup when measuring out the parts, makes it more precise still since quite a lot can cling to a cup when pouring it resin in to another. Less great for an explanatory video though. Good work on these, it's cool to see resin being used in a functional manner. Just don't go to to far into the glittery dark side :)
Thanks for the tip! I've tried doing some mixing by weight, but I think I need a more accurate scale, so I've got some digging to do. I was a little surprised by the acrylic too, and I've been getting recommendations for other pigments to try so maybe another set of tests is in order
You should try Rit DyeMore for synthetics like urethane.
I dyed my Dragons with Rit synthetic and colour fixative. Worked great. Fabric dye won’t work.
This was a fantastic video that answered all my questions!
This video was so well done 👏👏👏
It was only a matter of time before these parts of longboarding become diy. Love it! Also, sick hat
i had a job making poly parts in the 90s. we used a mocca and resin mix. we put our dye in the mocca. there is no other way worth a damn
I very much enjoyed that buddy. Making science cool to board riders 🤘🤘🤜🤛
Glad you enjoyed it! There's already a ton of science and R&D that go into the boards we ride, I'm just trying to showcase some of it
Cool experimentation
Great work. Are you still considering a part II for more testing?
Water makes urethane foam. The water in the screen printing ink was probably the culprit
I think you are right. None worked on my urethane resin ball plug for bowling ball. I was teying to save money anything bowling related is expensive lol. I'll order some mica powder and see if it will work
Love it just try it !
Nice one. Mixing A-B is usually best done by weight. Another good trick for really small tests is to use a syringe to meter out volume. Ratio=super important
very good . thx
Came across your video for info on tinting polyurethane wood finish. One thing Im considering that you didnt try is plain old food coloring from the cake decorating aisle.
I'm trying this later this week.
All I could find was gel food coloring. Not sure how that differs from the regular stuff I used to see but I'm going to test it as a wood finish. both straight on the wood and mixed into oil based polyurethane.
I assume the colorants are water based and that they have the glycol to help them mix with oils but I can't be sure.
I guess I'll find out.
Food coloring framed up for me. I don't have a pressure pot thou and using it in holes in a bowling ball
Rit liquid dye actually works really good on white urethane skateboard wheels.
use the synthetic version of the Rit dye
if the ratio has to be perfect, you can't measure using the same height in a conical cup, the volume is different and in a small batch, that's amplified.
I used urethane resin bowling ball plug to fill in some holes and I tried the acrylic paint food coloring and both tried in size over flowing the holes had to drill out idk why it worked on yours maybe the pressure pot? The bowling ball plug colors are expensive as is the ball plug. I wonder if I should order the stuff you are using and test it out on an old bowling ball
I'm trying to tint my polyurethan rubber mate grey, but i cannot succeed. I tried pigments, acrylic paint, and even graphite powder. Some acrylic seemed to tint it a bit before pouring (but I had to use a lot), but when curing it went back to dark brown, like the normal urethane. I don't know what to do :(
I’m looking for a bright yellow color ! Any good dye colors out there
I've seen lots of people use the Rit dye on set urethane when they were dyeing roller skare wheels.
Dyeing wheels that have already been cast is a whole 'nother art and one that I haven't experimented with yet. Looking forward to giving it a shot, especially if I can find some white urethane!
@@GoodRoads it works on translucent as well
So I’m trying to color smooth on vyta. Any one know what else to use? I know it cures white and I’m trying to make it silver. Would acrylic paint work?
You video made me save a bunch of darn money!
What about all natural, like gettikg color from plants and flowers etc. ?
Nice video!
My advice, get a gram scale (jeweller's scale), this way you can get super accurate ratios even if you do small pours.
Also, my experience is that anything containing water (fabric dye, acrylic ink, acrylic paint, etc) will cause the urethane to bubble. I think the only thing that saved your acrylic paint tests in this case was the pressure pot. Some urethanes are more sensitive than others, for example I have a water clear acrylic that bubbles if you look at it skew.
I wish I would had seen this. It's true what u say. The pressure pot really helped his
@@StephRenee812 yes, I almost always cast using my pressure pot, it helps so much. 👍
were can i buy the dye?
Excellent test! I'd like to see if you can use kool aid since its sometimes used when dying wool at home
I'm getting a bunch of fun and weird recommendations, so I may have to do a v2 of the tests. Kool aid is now on the list
🔥🔥👍
Maybe the failure is due to the water soluble nature of the dyes? Don't know, but I'm fairly sure that Rit dye is water based.
Interesting stuff though. And subbed too. Thanks mate.
That's EXACTLY it. Urethane is made from a polyol and isocyanate mixed together. Isocyanate also cures when exposed to water, but in that case the polyol doesn't get consumed and the byproduct of isocyanate and water is a ton of CO2 gas, which causes bubbling or if you're using water-based dyes enough bubbles to basically become a foam. Some polyurethane foams are actually made using water as a foaming agent.
Why is that you only have 3K subs? Your videos are great!
Thanks homes! Tell your friends!
Definitely got me wanting to do SCIENCE! 😘
what about food color
Maybe fabric ink contains water, polyurethane resin is really sensitive to it, even humidity
Huh. When I mixed acrylic paint with Flex-It 90, it was a complete disaster. It bubbled and frothed right out of the mold, like a witch's brew oozing out of the pour spout and air vents. It was BAD!
Have you experimented with dyeing after your casted urethane has already cured ? : ie dye white or clear bushings or wheels after they have been made and cured.
I haven't experimented with that at all
Question: has anyone tried spray painting their urethane wheels?
Ur making fingerboard wheels too? Same
Should of tried Rit Dyemore it’s made for synthetic materials.
Interesting... I think there's going to have to be a part 2 to these tests at some point
@@GoodRoads I’m all for a part 2 👍🏽
@@GoodRoads I have a question. I’m thinking of dyeing wheels a navy blue but I don’t know which color wheel would work best. Perfect scenario would be a white wheel but I don’t have. It’s either a clear yellow or clear green like a teal color. Which would get me a better navy if I dye with blue?
You'll be able to get a deeper blue with the amber / yellow urethanes. The urethanes that cure white are very hard to get dark colors with because whatever pigments you add to the urethane is effectively getting mixed with white. The amber color of the clear urethanes will effect the blue and pull it towards a green a little bit, but you can still get really nice results.
@@GoodRoads thank you
ah jeeez rick I forgot my lab coat
Sometimes science is more art than science, Morty.
i finally subscrined. and dang you have souch cool content too wwtch
Thanks homes! I'll keep it coming!
I understand you kinda have to use something for synthetics.. bit I'm not an expert, just a skate person