WetCanvas
Home Member Services Content Areas Tools Info Center WC Partners Shop Help
Channels:
Search for:
in:

Welcome to the WetCanvas forums. You are currently viewing our boards as a guest which gives you limited access to view most discussions, articles and access our other FREE features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload your own photos and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please visit our help center.

Go Back   WetCanvas > The Learning Center > Color Theory and Mixing
User Name
Password
Register Mark Forums Read

Salute to our Partners
WC! Sponsors

Our Sponsors
Reply  
 
Thread Tools Display Modes
  #1   Report Bad Post  
Old 05-08-2012, 07:48 PM
trytopaint trytopaint is offline
New Member
 
Join Date: Dec 2011
Posts: 4
 
Dark Blue for Cobalt Blue glass

Hey all you paint experts.
I could really use a pointer on making a really dark blue.
I am painting a cobalt blue glass vase for my Mom for mothers day and she loves cobalt glass. Its not a cobalt blue, looks more like dark ultramarine.
I need to get parts of the vase in shadow REALLY dark. I have put the max of true Ultramarine on and its not dark enough.

Your thoughts??
Reply With Quote
  #2   Report Bad Post  
Old 05-08-2012, 09:47 PM
wsrea's Avatar
wsrea wsrea is offline
Veteran Member
Roanoke VA
 
Join Date: Jan 2004
Posts: 651
 
Hails from United States
Re: Dark Blue for Cobalt Blue glass

Option 1: get ultramarine blue deep. It's darker than ultramarine. However, there is an easy work-around to darken regular french ultramarine.

Option 2: Ultramarine is a dark blue with a tiny reddish tinge. Try adding a touch of dark-slightly-yellowish red (eg, burnt sienna) to some ultramarine. You'll get a predominantly-blue-with-a-tiny-bit-of-blue/red/yellow in it. Blue/red/yellow equals black. So essentially you're mixing black with your ultramarine.

You do not want to mix in a tube black (ivory, mars, etc black) because it will "deaden" the color. Instead you are adding a "chromatic" black made by mixing red/yellow/blue. Mix tiny quantities of each color until you get the proportions figured out. Another chromatic black is approximated by viridian plus a dark red like alizarin or cad red deep, or by prussian blue/alizarin/burnt sienna.

...Or you can buy chromatic black in a tube, but I never saw the point when it's actually pretty easy to mix on the fly.

Hope this helps. Good luck!
__________________
Bill

Comments and critiques are invited
website: www.williamrea.com

Last edited by wsrea : 05-08-2012 at 09:51 PM.
Reply With Quote
  #3   Report Bad Post  
Old 05-08-2012, 11:38 PM
llawrence llawrence is offline
Lord of the Arts
East of Eden
 
Join Date: Feb 2008
Posts: 2,691
 
Re: Dark Blue for Cobalt Blue glass

I've used black to darken ultramarine all the time, I think it works well for that personally.

This post from "Show us your palette" seems relevant to the OP:

#121
__________________
My website: http://www.rusticportraits.com
My artwork blog: http://llawrencebispo.wordpress.com
My art materials blog: http://sunsikell.wordpress.com
Reply With Quote
  #4   Report Bad Post  
Old 05-09-2012, 03:57 AM
Gigalot's Avatar
Gigalot Gigalot is offline
A WetCanvas! Patron Saint
Tbilisi, Georgia
 
Join Date: Jun 2009
Posts: 3,102
 
Hails from Georgia
Re: Dark Blue for Cobalt Blue glass

I use black ink lacquer prepared with self made vine black powder and commercial alkyd varnish diluted in turpentine oil. It is glossy and dries less than one hour, also with lowest possible tinting strength but deep black - best for me to make thin shades for red, blue, green, white, ocher and even yellow.

I stopped to use complementary black mixtures because of bronzing effect and and plus it`s color often depends of available light. If you like black color - use BLACK, not mud surrogate!

Last edited by Gigalot : 05-09-2012 at 04:31 AM.
Reply With Quote
  #5   Report Bad Post  
Old 05-09-2012, 04:29 AM
querin's Avatar
querin querin is offline
Lord of the Arts
Australia Sydney
 
Join Date: Jul 2006
Posts: 2,354
 
Hails from Australia
Re: Dark Blue for Cobalt Blue glass

I would use UMB with a black mix of Pthalo green and Alizarin or quin red to make a neutral transparent black add it to the UMB or another blue .
querin
Reply With Quote
  #6   Report Bad Post  
Old 05-09-2012, 04:39 AM
Gigalot's Avatar
Gigalot Gigalot is offline
A WetCanvas! Patron Saint
Tbilisi, Georgia
 
Join Date: Jun 2009
Posts: 3,102
 
Hails from Georgia
Re: Dark Blue for Cobalt Blue glass

Phthalo + Alizarin or Phthalo + Naphtol FBB carmine has a deep black color. Somewhat deeper than mars black. But it has a highest possible tinting strength while I like lowest possible power, even less than green earth PG23.
Reply With Quote
  #7   Report Bad Post  
Old 05-09-2012, 12:56 PM
llawrence llawrence is offline
Lord of the Arts
East of Eden
 
Join Date: Feb 2008
Posts: 2,691
 
Re: Dark Blue for Cobalt Blue glass

Quote:
Originally Posted by Gigalot
But it has a highest possible tinting strength while I like lowest possible power, even less than green earth PG23.
I like a low-tinting strength black too, convenient for skin tones. I use a natural black earth for that, works well.

I haven't made vine black before, but someday I'll try it out!
__________________
My website: http://www.rusticportraits.com
My artwork blog: http://llawrencebispo.wordpress.com
My art materials blog: http://sunsikell.wordpress.com
Reply With Quote
  #8   Report Bad Post  
Old 05-09-2012, 01:10 PM
sidbledsoe sidbledsoe is offline
WC! Guide
Maryland, USA
 
Join Date: Jul 2007
Posts: 11,758
 
Hails from United States
Re: Dark Blue for Cobalt Blue glass

I need to get parts of the vase in shadow REALLY dark. I have put the max of true Ultramarine on and its not dark enough.

Your thoughts??
Try prussian blue mixed with french ultramarine, if not dark enough then add small amount of burnt sienna or an umber to that.
__________________
You don't have to be crazy to paint, but it helps!

Last edited by sidbledsoe : 05-09-2012 at 01:13 PM.
Reply With Quote
  #9   Report Bad Post  
Old 05-09-2012, 02:19 PM
timelady's Avatar
timelady timelady is offline
A WC! Legend
She who rambles
 
Join Date: Jan 2001
Posts: 11,457
 
Hails from United Kingdom
Re: Dark Blue for Cobalt Blue glass

I'm a glazer so when I need a really deep dark blue I alternate thin transparent layers of something like raw umber or burnt sienna and my deep blue, whatever blue that may be. (sometimes ultramarine, sometimes anthiqu, sometimes pthalo)

Tina.
__________________
tina-m.com : tina-m.blogspot.com
Reply With Quote
  #10   Report Bad Post  
Old 05-26-2012, 12:23 AM
Art_song Art_song is offline
New Member
Central Coast , California
 
Join Date: Jan 2003
Posts: 6
 
Hails from United States
Re: Dark Blue for Cobalt Blue glass

Mixing transparent colors for blacks are ideal, much better than a black pigment. If the tinting strength is too strong, and typically transparent colors are very high tinting strength, then dilute it with your medium and store it ready to use in a jar or tube, depending on the type of paints you are using. ASW sometimes has a great sales on empty tubes.
__________________
Artsong
Reply With Quote
  #11   Report Bad Post  
Old 05-26-2012, 04:45 AM
Gigalot's Avatar
Gigalot Gigalot is offline
A WetCanvas! Patron Saint
Tbilisi, Georgia
 
Join Date: Jun 2009
Posts: 3,102
 
Hails from Georgia
Re: Dark Blue for Cobalt Blue glass

It is best to make a choose between Monet and other art immediately. Personally, I love Monet, but i love painting more!
I agree that modern synthetic gel medium (which contain a lot of fillers and extenders) is well tested product but I like oil (alkyd) + pigment formulation more while the oil should be used in small quantities.

Last edited by Gigalot : 05-26-2012 at 04:58 AM.
Reply With Quote

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -4. The time now is 02:14 PM.


© 2014 F+W All rights reserved.