S5 modeller Posted March 2, 2015 Share Posted March 2, 2015 Hi chaps. Got a question on paint mixing ratios. I should be able to work it out myself, but my brain can't see it. Need to mix up 80% black to 20% blue. I intend to use a full 10ml tinlet of black enamel for the 80%, would I then need to add 2ml of blue for the ratio to be correct? Sounds right in my head, but I'm not so sure. Can someone put me right? Thanks for looking. Matt Link to comment Share on other sites More sharing options...
Caution Wake Turbulence Posted March 2, 2015 Share Posted March 2, 2015 2.5ml of the blue - 4 parts black to 1 part blue. HTH Andrew 1 Link to comment Share on other sites More sharing options...
S5 modeller Posted March 2, 2015 Author Share Posted March 2, 2015 Thanks andrew, that's a big help. I was only 0.5ml out then. Do you think it would be easier to measure the out by weight or volume? Link to comment Share on other sites More sharing options...
Caution Wake Turbulence Posted March 2, 2015 Share Posted March 2, 2015 Try and get some of those disposable plastic pipettes (the ones I have seen are graduated in 1/2ml increments). I think you'd need to have quite sensitive scales to work with such small quantities of paint, although in principle it might be the more accurate method. Cheers, Andrew 1 Link to comment Share on other sites More sharing options...
robvulcan Posted March 2, 2015 Share Posted March 2, 2015 Get yourself some scales off ebay that weigh in very light amounts. I use this for weighing out resin and catalyst which can be in very small quantities. usually will only cost about 6 quid too. They come in for other needs as well. Like nose weights etc. Cheers Rob 1 Link to comment Share on other sites More sharing options...
S5 modeller Posted March 2, 2015 Author Share Posted March 2, 2015 (edited) Cheers chaps. Got some tamiya pipettes, but the graduations are crap. I also have some syringes I might use. Just ordered a set of jewellery scales off of ebay, just £3.49 with postage, they weigh 500 grammes in 0.01 gram incriments. As they are coming from china ( where else?) they will take a couple of weeks to get here. Edited March 2, 2015 by S5 modeller Link to comment Share on other sites More sharing options...
robvulcan Posted March 2, 2015 Share Posted March 2, 2015 Cheers chaps. Got some tamiya pipettes, but the graduations are crap. I also have some syringes I might use. Just ordered a set of jewellery scales off of ebay, just £3.49 with postage, they weigh 500 grammes in 0.01 gram incriments. As they are coming from china ( where else?) they will take a couple of weeks to get here. You will be surprised I find from china stuff often gets there quicker than domestic purchases. Link to comment Share on other sites More sharing options...
treker_ed Posted March 2, 2015 Share Posted March 2, 2015 (http://www.amazon.co...ix=syringes,aps - quick search on amazon - syringes) I just buy these sort of things when I need to - quite accurate when I need them as the 1ml are graduated in 01.ml and the 5ml are graduated in 0.2ml. Link to comment Share on other sites More sharing options...
Tom Hall Posted March 2, 2015 Share Posted March 2, 2015 Generally, S5, as long as consistency of part A and part B are similar, you will need to measure paint formulae by volume. Mould making and resin batching are more likely to be by weight, but you will want to read the mixing instructions when the time comes. Rob, do you recommend a postage scale for the resin mixing? Not precise enough? Link to comment Share on other sites More sharing options...
robvulcan Posted March 2, 2015 Share Posted March 2, 2015 Generally, S5, as long as consistency of part A and part B are similar, you will need to measure paint formulae by volume. Mould making and resin batching are more likely to be by weight, but you will want to read the mixing instructions when the time comes. Rob, do you recommend a postage scale for the resin mixing? Not precise enough? It depends on how much your mixing, I have 2 scales for very small amounts I use a Jewelry scale. For the big stuff I use a Tesco Digital food scale. Works fine for me. Cheers Rob 1 Link to comment Share on other sites More sharing options...
treker_ed Posted March 2, 2015 Share Posted March 2, 2015 Generally, S5, as long as consistency of part A and part B are similar, you will need to measure paint formulae by volume. Mould making and resin batching are more likely to be by weight, but you will want to read the mixing instructions when the time comes. Rob, do you recommend a postage scale for the resin mixing? Not precise enough? I would agree - mix by volume not weight hence suggesting getting syringes to measure the paint out. They are,surprisingly, very accurate. 1 Link to comment Share on other sites More sharing options...
Graham Boak Posted March 2, 2015 Share Posted March 2, 2015 Two points. Firstly, is there significant differences in the densities of different colour paints (apart from metallic, perhaps)? Secondly if the mix has been specified using volumes then the match will be achieved using volumes. If there's little difference in the densities than the same result will be achieved using volumes or weights. If there is a difference in the densities, then using weights when the specified mix used volumes will give you the wrong result. 1 Link to comment Share on other sites More sharing options...
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