Re: Krylon Ultra-Flat Black (was Re: matte black paint pen)

[Murray Leshner <murrayatuptowngallery@yahoo.com>]

Don't spray that UFB into plastic cups and the like to dip a brush into...it eats them. Doesn't like foamcore either (actually it likes it alot).

 

I think Sherwin Williams (or Benjamin Moore if I am wrong) has (had?) a dead flat optical black paint, discussed on Bob Monaghan Med Format  site. I talked to local store once about 2 years ago, roughly $40/gallon, no smaller containers available. they confirmed it's existence.

 

I found some <4% lusterless alkyd (enamel?) that makes the Krylon look sparkly, and it's not even dead flat. I have to find out if it something you can buy in retailville...it was some kind of airplane paint or something.

 

Murray

Ryuji Suzuki <rs@silvergrain.org> wrote:

> So I wrote down Krylon Ultra-Flat
>  Black from Richard's posting
> on my notepad and went to a hardware store down the
> street. It's really surprising they had it. I live in the city
> so I usually get anything generic but when it comes to
> anything specific, unless it's an icecream brand, I usually
> have to drive 30 minutes to go to a big store in suburb or
> mail order. For example, you can't buy the kind of toilet
> paper that's nice to your (or anyone's) ass, so you'd Amazon
> TP. Anyway, they had Krylon Ultra Flat Black in spray and
> quart.
>
> This paint is a good deal less reflective black than other
> black paints I tried, but it looks reflective until it dries
> out completely. It seems to require quite a bit more time than
> the advertised drying time in open air drying to get minimum
> reflection. I still see reflection from the treated surface,
> but at least it's a bit dimmer and less specular. Let's see
> whether this really improves the picture. If it doesn't, I
>  may
> have to go to the next step to order optical quality
> antireflection paint. If someone needs good paint for pinhole
> camera or more serious homemade LF cameras, I think this paint
> is perfectly usable for anything away from main light
> path. It's probably usable for lens hood, etc., before the
> optics. These examples are probably along the line of
> Richard's suggestion. However, my case is tricky because the
> reflection is caused well within the coverage of the lens.
>
> Incidentally, in Horizon Perfekt, the reflection is made by
> blunt edges of thick (about 1.5mm) plastic pieces used to make
> the slit shutter. I think they should've made many fine
> grooves or other textures on the edge, and better yet to bevel
> the edges so that the reflection goes away from the film.
>
> Just a quick progress report for today.