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Jaxboat

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Posts posted by Jaxboat

  1. Hi Bob

    Love your build! You mentioned you were on your last bottle of Polyscale. I am not the craftsman that you are but I do know a little about paint. Micromark is now selling water based paints that color match the old Polyscale paints. The new range is private labeled for them by Vallejo, a Spanish company. These paints have excellent flow and leveling for water base paints. They can be brushed or sprayed with excellent results.  I doubt we ever see water based paints that perform as well as the best solvent borne paints because water is a lousy solvent with way too much surface tension. However, Vallejo and others (e.g., Tamiya) have made huge strides in WB paint performance. You might want to experiment

    Best

    Jaxboat

  2. Hi Druxey,

    Love this discussion. White lead carbonate was used in house paints (exterior) as late as the early 70s. It had the advantage of resisting mildew. However, it turned grey if exposed to sulfur fumes H2S, SO2. This was a common problem in Southern US regions near wet lands (PC term for swamps). I would expect a similar situation in any marine environment. Red lead (minion) is Pb3O4.  PbO is Yellow lead oxide. Bizarrely, PbO is still used widely in the US for painting lateral delineators on roads. In the case of Victory, perhaps some of the lead oxide was off spec and had a touch of red lead in it. Even a tiny amount would effect how certain people would perceive the color. Kind of bazaar, though. I can't envision Nelson fighting Trafalgar on a pink Victory/Victoria :huh:

    Jaxboat

  3. I did a little research on "Milk Paint". The binder is casein which, indeed, does come from milk. Many of the pigments they use were indeed available during the great age of sail. (iron oxides).  Ultramarine is a synthetic version of Lapis Lazuli which was used in blue paint but was extremely expensive until the synthetic version was accidentally discovered in the 19th. Chrome oxide green was not available until mid 19th century, All of the pigments I saw listed were inorganic and very color stable under normal UV and temp conditions.  Best aspect of these paints is their total lack of toxicity. I would be somewhat concerned about their durability from a UV exposure and moisture resistance standpoint.

    Jaxboat B)

  4. HI Greg,

    I can testify that dye spills are a disaster! :P The dye seems to have near zero surface tension. In my case, it flowed through the cap (tightened)  when I accidentally knocked over the bottle and did not notice it had fallen over. What a mess :(. Since dyes have no solids like paint and do not form a film I know of no reason that you could not use the same adhesives on dyed pieces as you would on undyed pieces. My clumsiness is legendary :rolleyes: so I have switched back to paint out of fear! ;)  Still, there is no denying the dye has a wonderful degree of "jetness" that is hard to obtain with paint.

    Best

    Jaxboat B)

  5. RE: Fatty acids. Yes fatty acids would have less acidity than Muriatic acid because the acid group's effect would be diluted (COOH in chem speak) by the long fatty carbon chain. For example Tall Oil fatty acid (the word "tall" in this context has nothing to do with height) is a derivative of pine trees. It is the active ingredient in Murphy's oil soap and is a C18 fatty acid.

  6. Druxey raised my curiosity about beeswax with his comments on conservators wax. I was selling beeswax and its derivatives into the personal care industry at the time. I confirmed all of Druxey's comments with a beeswax/wax expert. Beeswax is a natural product with a very broad range of chemical substances many of which are not "wax".  In the long term, beeswax does become slightly acidic. Do not know what the time frame is for the pH effect to occur.  Microcrystalline wax is a 100% hydrocarbon based wax with no acid components either as supplied or upon aging. There are different grades of MC wax based on melting point range. I don't remember what the range is for the conservators wax.

     

    There are also different grades of beeswax also, depending if it was bleached to reduce color or distilled to increase melting point. If I was looking to finish a model with wax, I think I would choose carnauba, a plant based natural wax. It is harder than beeswax. For those of a certain age, you might remember Du Pont's Simonize Car Wax. It was almost all carnauba wax with just a touch of a hydrocarbon solvent to make it workable. "Wax on, Wax off", grasshopper :P.

    Best

    Jaxboat B)

    PS: OCD Chemist peeve - you "dissolve" wax into turps, not melt. You can "melt" wax with the proper application of heat

  7. HI Dave,

    I did not like it at all. I apply glue from a syringe device and I could not fill the reservoir easily with the stuff. To get the no run no drip viscometrics of No-run No drip you would have to have some kind of additive. Don't get me wrong, Titebond has an excellent product line. I would just use one of their conventional flow PVAs if it were me. Surprised about your comments about Weldbond. Isn't it a PVA too?

    Best

    Jaxboat B)

  8. Received correction package from ME. I made my request along the lines of what Terry said he received. The new laser cut parts look to be a real step up from the stuff I originally received and weren't made from "mystery" wood. I also received a new instruction book. I did not ask fro new plan sheets. Can anyone comment if I should have? While I appreciate MEs supplying the new parts, I would like to respectfully point out that they could have saved a lot of angst (and expense) if they had built a second prototype out of production parts to catch any problems BEFORE they shipped out the early kits.

    Best

    Jaxboat B)

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