Transparent Enamel Color Plates
Enamel colors, some of my favorites enamel colors.
B30 …these two are true yellows
N27…these three are green yellows
L21 very dark
In my list of my favorite enamel colors if there is a B in front of the numbers this means it is from Bovano Enamel Supply Others you can order from E-namels.com and the are Ninomiya Transparent Enamels. Hirosaws Enamels are a new player to our game. I have tried quite a few and they are very clear! Here is a link to Hirosaws Enamels http://www.enamelartsupply.com Now suppling Ninomiya enamels also.
But there is nothing more important than making your own test places! Check it out here.
Properties of Opalescent Enamels. Okay, get ready for this. Most modern day opalescent enamels are not truly opalescent but rather semi transparent. A true opalescent is a mixture of two immiscible enamels. (Immiscible Definition
Immiscibility is the property where two substances are not capable of combining to form a homogeneous mixture. The components are said to be “immiscible.” In contrast, fluids that do mix together are called “miscible.”
Components of an immiscible mixture will separate from each other. The less dense fluid will rise to the top; the more dense component will sink. This can also be true of solids but in the case of enamels, it is referring to the molten state.)
The old leaded Thompson were true opalescent enamels. In the case of their 835 Opal White, the glass was immiscible unless fired too hot. If you fire them too hot they become miscible and the resulting glass becomes an opaque. According to the late (great) Woody Carpenter, these enamels also contained arsenic. The “too hot” varied from one batch to another. I have a rather large container of 835 that goes opaque at about 1325 degrees and so as long as you fire under that temperature, your results will be a glorious true opalescent enamel. It should be noted that most medium fusing enamels are meant to be fired hotter than this. It is possible to get them to a glossy stage at 1325 but it will take 3 minutes or more for a small jewelry piece. In actuality, it doesn’t matter how many times you fire a piece as long as it never gets hot enough to change the chemical makeup and cause it to go opaque. Because they are so delicately fussy about temperature, you may find that firing on a layer near the end is safer for you but it really is about the temperature.
The Japanese opals are all semi transparent and not sensitive to overheating. The colors are quite lovely and troublefree but not actually opalescent enamels. Have a look at a Faberge Egg in person some time for an example of Opalescent Enamel. They are delicious.
The Lion and the Lamb
“Let us be dissatisfied until that day when the lion and the lamb shall lie down together and none shall be afraid.” -Martin Luther King, Jr .
The theme for American Jewelry Design Council 2018 is “Together”.
Enamels on Different Metals-What A Difference.
What a difference in the brilliance of the color. You can use foils to your advantage to get the enhanced color you are looking for. Gold foil makes colors have more yellow. Copper will warm colors up. Silver will make the true color and sparkle.
You can add foil anywhere in your jewel. If your base plate is copper add a small amount of silver foil to make a little sparkle with your favorite color of enamel.
A question came up today about when to use hard, medium, and low firing enamels.
Hard firing enamels are fired at a higher temperature as in the 1500’s degree range or longer in the kiln.
Medium firing enamels I think of using in 1400’s degree range, or at higher temp as 1500 degrees, but less time.
Low firing enamels maybe fired in the 1300’s or even in the 1400’s with less time.
The purpose of all this is to balance two things.
First the expansion of the metal being used.
Second your technique being used.
Starting with copper as it is used most commonly in enamels.
Copper oxidizes the fastest of the metals we use in enameling. We balance this by using medium firing enamels so they melt or fuse before the copper has time to oxide. And using higher temperatures. If it oxidizes the enamel is likely to flake off or just discolor, but many enameling on copper use the oxidation to get some beautiful colors.
Another way to balance this is to use finer grit of enamel. The finer grit will fuse quicker than a larger grit of enamel without allowing oxygen to get to the copper. Without oxidation the enamelist achieves that beautiful gold or stunning golden orange copper color.
It is best to know the fusing points of all your enamels not only so you know which ones to apply as a base coat of enamel known as flux, which should be the hardest enamel, to avoid the lower layer to rise above the secondary layers as seen below.
Low firing enamels vs high firing enamels
Above the flux was a lower firing enamel than the top coats. So as the top layers melted the flux rose up along the edges and the top layer of enamel puddled in the center.
2) Same here,
Low firing enamels vs hard firing enamels
In this next image flux coat of enamel was not hard enough to prevent the following layers of enamel from touching the sliver. And the brownish color of enamel is burning.
In cloisonné we never want our warm colors to touch the silver. It causes burning. Silver is going to hold heat longer than copper so we use a hard firing base. And in some incidences we will use several layers of the hard firing flux before layering in our warm colors to be very sure the red never touches the silver base.
Along the wall of the fine silver cloison wires I will put a fine line of blue to keep any warm color from burning.
Enamel burning along the cloison wires.
A comment to address
“I’m torch-firing, I always have my work in my sight so I just watch for signs of melting, which happens very fast. I’ve had “pull through” with Titanium White. Titanium White really reacts nicely with copper and you can get some really lovely, but unpredictable, effects. With a little over firing the enamel turns a beautiful rust color and in spots will be green.”
Yes these effects can be used to your advantage, this is the oxidation of the copper coming through. And in torch firing I realize you are not going by temperature and have the advantage of seeing all that is happening.
Enameling on copper, as in painting enamel in this piece,
When you need hard firing enamels
It is necessary to use a hard firing enamel = flux as it will be fired many times and I do not want the painting to disappear into the base coat of flux. Also in repeated firings the copper can still oxidize through the enamel and show a color change after many firings. As I paint my image I need the painting enamel to adhere to the base coat of flux by firing the piece, then I can continue layering my painting with enamel colors (soft firing enamel) that fire at a lower temperature or less time. The domed metal add strength or less expansion. So it can handle a harder firing enamel without so much expansion or movement in the enamel. If the base coat was a lower firing enamel it would become soft enough in firing the image would distort as the enamel base or flux would move before the image enamels fuse. Painting enamels are a soft or low firing enamel= as they are ground to a face powder grit.
Make color plates
The enamel dot fourth from the left is still grainy after all the rest are fused. If you have three enamel on a plate, one hard firing, one medium firing, one low firing and fire the plate once, you will see they melt at different speeds.
If you want to use them all in one project just remember the hard is on the bottom then the medium and then the low firing enamel. This is also why you can use unleaded with leaded enamels as long as you put the unleaded on the bottom as it is a high fire enamel.
A couple of things tiny bubbles in enamels can be from,
First the addition of Klye-fire. I do my best not to use this but I realize in some designs we need it. The last time I used Klyre-fire, a mixture of 1-5 parts distilled water was best. It helps on a 3d surface but I could still see a few tiny bubbles. Klyre-Fire is very helpful on plique a jour. But you do see time bubbles.
Second way you can get those frustrating tiny Bubbles in enamels can be from sterling silver that has not been depleted properly. The more you fire the worse they get.*(
And last that I have seen, specks that usually come from old or deteriorating enamels. When you wash them you see tiny white specks in the container. On your first few firing you will see some are white in your enamel, then continue firing some look like beige-brown goo, and sometimes they turn into bubbles.