As one who spent a few decades in the quality control of concrete and related 
materials and their use thereof:  No two batches of concrete are exactly alike; 
unless you got into colored architectural mud, you really did not worry about 
color matching in the real world.   

In short, just hit the range, not an exact shade.  "Green" concrete usually 
lost that tinge in days to maybe a few weeks. It did not just "dry", it 
"Cured".  Even the "aggregate" will affect appearance.  Maybe want to simulate 
such "faults" as iron stain, pop-outs, spalling, etc.  The techniques of 
controlling cure and protection are obviously beyond the scope of the course 
here; but there is no need to try to hit a target the size of a golf ball, when 
a target the size of a basketball would probably suffice.  

For those from the industry:  Our local PCA rep always told us we were in 
trouble if we saw a concrete finisher smiling while he worked that float.  




  ----- Original Message ----- 
  From: Pieter Roos 
  To: Keith Blanchard ; [email protected] 
  Sent: Sunday, January 14, 2007 8:17 PM
  Subject: Re: {S-Scale List} Re: concrete color


  Hi Keith and Keith;

  For the more tan toned concrete I like Apple Barrel
  "Antique White" craft paint. Not sure it would be
  appropriate for a whole building, for that you might
  look at non-hobby spray paints. I do asphalt raods by
  painting the base flat black and "misting" with Krylon
  (I think, need to find the can and check) "Dove Gray".
  That might work better for a cast concrete building.

  Pieter Roos

  --- Keith Blanchard <[EMAIL PROTECTED]> wrote:

  > Hi Keith,
  > I have been working on the same problem. With our
  > new concrete 
  > structure soon to be released, we best find a
  > solution real soon.
  > 
  > I have observed two types of concrete we can model.
  > Old and New. New 
  > concrete, just a few years old, has a gray color,
  > aka Floquil concrete 
  > color. Old concrete has a tan color. Mostly shades
  > of tans and browns. 
  > I like to apply a wash of diluted gray over this
  > light tan color. Then 
  > give a final wash of diluted ink for age. Its kind
  > of a trial and 
  > error process unless you have exact formulas. I
  > actually use the gray 
  > and ink washes from our woodsy stains for this
  > process. Blot the 
  > inkwash from the piece with a tissue so it does not
  > look too black.
  > I would like to find a flat arisol spray for the
  > base color to add 
  > into our instructions.
  > Working on solutions, Keith Blanchard
  > http://www.pinecanyonscalemodels.com
  > 
  > --- In [email protected], Keith Thompson
  > <[EMAIL PROTECTED]> wrote:
  > I've been trying to find a color mix for concrete. 



   

[Non-text portions of this message have been removed]



 
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