Marcia Selsor Posted July 18, 2017 Report Share Posted July 18, 2017 I am trying to develop and expanded palette for foil saggars. So I am testing my 8 strongest colors and overlapping them, adding some washes of things like strontium chloride, calcium chloride,and magnesium chloride. I am particularly interested to see if the magnesium will have and influence on the cobalt sulphate or cobalt chloride. I made three of each test tile to fire at three temperatures at 100 degree intervals. I am mixing in very small quantities of 6.5 grams per 1/8 cup of water. I have my kiln set up and covered up on the concrete patio and I'm waiting for the rain to stop. Hopefully tomorrow will really be sunny. I have 17 tiles Link to comment Share on other sites More sharing options...
Joseph Fireborn Posted July 18, 2017 Report Share Posted July 18, 2017 Ohhh. I can't wait to see the results. Love when you professionals post this goodness. Link to comment Share on other sites More sharing options...
Denice Posted July 18, 2017 Report Share Posted July 18, 2017 Have fun! Denice Link to comment Share on other sites More sharing options...
CPyle Posted July 18, 2017 Report Share Posted July 18, 2017 Can't wait to see the results Link to comment Share on other sites More sharing options...
Marcia Selsor Posted July 18, 2017 Author Report Share Posted July 18, 2017 I got some interesting results. Need to contemplate and will post the realization of what I got. Marcia Link to comment Share on other sites More sharing options...
glazenerd Posted July 19, 2017 Report Share Posted July 19, 2017 Taps fingers..... waiting.... Link to comment Share on other sites More sharing options...
Dick White Posted July 19, 2017 Report Share Posted July 19, 2017 Taps fingers..... waiting.... And I am have a full-on holding-my-breath-until-I-turn-blue screaming kicking tantrum on the floor (as if this is the cereal aisle in the grocery) until you show us the goods Link to comment Share on other sites More sharing options...
jrgpots Posted July 19, 2017 Report Share Posted July 19, 2017 That is like saying "Santa has come, now go back to bed."....I agree with Dick. Waiting...waiting,,,waiting LOL Jed Link to comment Share on other sites More sharing options...
Marcia Selsor Posted July 19, 2017 Author Report Share Posted July 19, 2017 Here are the results fro my color tests. Chemicals were Copper, Cobalt, Iron, Manganese, chrome in the form of sulphates, chlorides and nitrates plus sodium and potassium nitrates. Minuscule amounts of 6.5 grams were mixed in a 1/8 cup of water. 5 various rows with three tiles with the same colorants fired at roughly 1175 F, 1250 F and 1350 F. The tiles are marked roughly. Three circles of cases were Barium, Calcium and Magnesium chloride. Hoped to see if these fluxes would effect the metallic colorants as they do in a glaze. calcium seemed to do that the most.a cross of copper nitrate was across the tile. Edited notations:DISCOVERIES:temperature variations were significant on Nickel and Cobalt Chloride and Copper SulphateHalos develops between nitrates and chlorides. Blushes worked well between Chlorides and sulphates White dots were from epsom salts and more colorful lighter dots were strontium chloride crystalsYellow developed w/ Calcium Chloride and Sodium Dichromatenice aqua blush w/ sodium dichromate , Copper Nitrate and Cobalt ChlorideCobalt, Copper and Nickel chloride need higher saturationColor in chlorides weakened in higher temperatures. Link to comment Share on other sites More sharing options...
Judith B Posted July 19, 2017 Report Share Posted July 19, 2017 Wow so cool! B3 C3 and E3 have some very cool effects, I like how the colours interact with each other on B3 Link to comment Share on other sites More sharing options...
Marcia Selsor Posted July 20, 2017 Author Report Share Posted July 20, 2017 I never used sodium dichromate before. I like the color response also. There is a lot of potential there. I will probably do a firing next week. Leaving for the Brickyard Bash this weekend at the Archie Bray Foundation and the Montana Studio tour in Helena. Potters fix this weekend.Beautiful weather here in Montana. Marcia Link to comment Share on other sites More sharing options...
oldlady Posted July 20, 2017 Report Share Posted July 20, 2017 i know you are interested in the individual test tiles but what it looks like all together is a quilt. if you had made holes in the discs, you could hang them all on the wall or door of your studio. Link to comment Share on other sites More sharing options...
Marcia Selsor Posted July 21, 2017 Author Report Share Posted July 21, 2017 Thanks Alice. I got the same responses from several people on Facebook sites.I am excited about the potential color especially with the washes which have reactive qualities as Glazenerd pointed out. Barium Chloride, Calcium Chloride and Magnesium Chloride. I am still seeking the Cobalt pink. Marcia Link to comment Share on other sites More sharing options...
Marcia Selsor Posted July 28, 2017 Author Report Share Posted July 28, 2017 Here is the best test for the day. Must make some pieces with Coleman porcelain which smooths and burnishes beautifully. Link to comment Share on other sites More sharing options...
jpdes Posted July 31, 2017 Report Share Posted July 31, 2017 This is very useful information. Thanks for sharing, Marcia. What colorants were used on your "best test for the day" piece? Are the outlines a halo effect? Can you share the temperature and hold used? In a previous post you mentioned the Riggs' saggar firing schedule of 1650F with a 20 minute hold. Why go so high when such good coloration is achievable at lower temps? Link to comment Share on other sites More sharing options...
Marcia Selsor Posted August 2, 2017 Author Report Share Posted August 2, 2017 here is one from yesterday. got some keepers. I have 2 that need more work. Link to comment Share on other sites More sharing options...
glazenerd Posted August 2, 2017 Report Share Posted August 2, 2017 I have to ask; in noticing the pattern that is forming in the last several pieces: is that application or reaction? Nerd Link to comment Share on other sites More sharing options...
Marcia Selsor Posted August 2, 2017 Author Report Share Posted August 2, 2017 Jpdes, The coloranst were sodium dichromate ***toxic, calcium chloride, and cobalt cl Gloried firedto 1300 F held fir 5 minutes in aluminum foil sagger. The Riggs fire ceramic saggar she which are using combustibles in the saggars which need a higher temperature to burn off compared to fuming salts in aluminum foil. Also the foil breaks down around 1400F. Yes it is a halo effect. Marcia Link to comment Share on other sites More sharing options...
Marcia Selsor Posted August 2, 2017 Author Report Share Posted August 2, 2017 Glazenerd, It is both application and reaction.some chlorides will react to sulphate with a halo. Link to comment Share on other sites More sharing options...
Marcia Selsor Posted August 3, 2017 Author Report Share Posted August 3, 2017 here are a few more Link to comment Share on other sites More sharing options...
Marc McMillan Posted August 3, 2017 Report Share Posted August 3, 2017 awesome stuff. You are inspiring me to do some additional experimentation as well. Thank you, Marcia. Marc Link to comment Share on other sites More sharing options...
Marcia Selsor Posted August 3, 2017 Author Report Share Posted August 3, 2017 This guy is inspirational Graeme Anderson. http://community.ceramicartsdaily.org/topic/16527-my-pots/ I want his tee shirt! Link to comment Share on other sites More sharing options...
glazenerd Posted August 4, 2017 Report Share Posted August 4, 2017 Still curious about how metallic zinc (zincite) would react in this scenario. Link to comment Share on other sites More sharing options...
Marcia Selsor Posted August 4, 2017 Author Report Share Posted August 4, 2017 I don't have any. Will look for some. Marcia Link to comment Share on other sites More sharing options...
Magnolia Mud Research Posted August 4, 2017 Report Share Posted August 4, 2017 If you want to get a volatile source of zinc use zinc chloride. lt Link to comment Share on other sites More sharing options...
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