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Hello Scenics! I want to know how many of you have encountered issues with the deep pigment Off Broadway colors, like Ultramarine Blue, and the ability to seal them without discoloration or color leaching. And most importantly, how did you overcome this? I have worked on a show once before where we had a small deck of ultramarine and, try as we might, we could not stop this from happening. I’m now faced with painting 4,000 sqft in the same color and with a gloss finish. I have sampled with over 5 sealing products, including Rosco’s own line of sealer (premier clear) and I am still getting the same issues. My base coat is black, then 2 coats of ultramarine and then sealer. I have to keep the sealer to 3 coats max (for time constraints.) We
cannotspray any scenery or use oil based products due to poor ventilation so it must be rolled or a pad must be used for application. Any advice is welcome, and thanks in advance. Have you tried mixing a sealer into the blue before you paint it on? Might make it a little stronger I’d try a base coat of U. Blue and then a glaze using Stays Clear and the same U. Blue. Shouldn’t bleed and should give you greater depth. Best of luck!
When you say leaching, is the UB coming up under additional painting on top of that color, of is it leaching onto other items that touch the surface like costumes or shoes? You did not mention what the floor is skinned with- could that have any impact on the paint’s behavior? Through the years, I have always found that Ultramarine Blue and Prussian Blue will come up under other colors, on occasions, when I tried to paint over them on fabric or hardcover flats. I have never been able to detect a pattern in the circumstances when it happens and it is only in places not the entire area painted with the blue.
I have not ever had the Ultramarine discolor under a sealer on a hard surface. I usually use Minwax Brand or Benjamin Moore water based polyurethane or SA Plastic Varnish as the sealer. I usually dilute it enough to spray three sealer coats with about an hour dry time between each one and an overnight cure before traffic on the floor in deal circumstances. ( However, ideal circumstances are few and far between.) If you are spraying water based in a pump up unit do you need special ventilation?
I always put a fan on the floor during the dry time. Could the faster evaporation time due to fan and lower viscosity due to the H2O make a difference?
Maybe adding some Flex Glue to the paint would help with stability problems? On the other hand I don’t know if you would want glue on a floor paint, I usually only add it for drops that will fold or roll for storage.
Ellen
I know this is an old post, but guess what? I am currently battling my old nemesis, Rosco Ultramarine blue, and I was hoping to find current advice. I think it’s worse than 4 years ago, sadly. Five + years ago, I attempted to skirt the issue with buying Artists Choice Ultra Blue, even though I liked the shade less, but of course, that company has folded. The Rosco rep at the time acted like it was a new problem (I soon found it wasn’t, since Rosco switched from using pigment to dye) and she showered me with Rosco swag and a new box of fitches in thanks for my sampling the various offending blues and sealers.
The Behr matte polyurethane sealer is a bit better for not raising the magenta dy, but not much. It’s a mess.
Hello Cristina~
I was curious so I did some testing on a black primed board. I tried my Super Sat Ultramarine (which may not be your first choice over black but it covered) and also sampled a mix of Nova Cerulean Blue (opaque) mixed with Nova Ultramarine (transparent) and that made a very nice color. I sealed all with Pro Parks Polyurethane from Lowe’s and did not get any magenta jump, the colors richened up beautifully.I have also painted a floor in deep blue using custom tinted All Flor which was pretty much an all in one step but could be sealed if you needed that.
Hi, Jeffrey- thank you for testing, very generous of you. Well, I think part of the problem might lie in my using Off Bway. (I remember a time when the Ultramarine Blue ROB got quite gritty as it got older, evidence of pigment and not dye being added.) I think I am going to have to switch to Nova or Super Sat before long despite the added expense.
Thank you for reminding me about Pro Parks. I have used it in the past and remember it being affordable. Unfortunately, the dancers (esp the tappers) are understandably VERY particular about the finish on the floor, and they like the Rosco Premeire Clear. (Which is now $126/gal, when it was probably $70/gal three or four years ago.)
thx again!
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