Metalpoint - Page 2 - Preparing The Paper
Preparing the paper or board: If a surface is not prepared in some way, the metal will not leave a mark. The preparation method is the one factor I am finding, as an experienced artist, that truly affects the outcome of the drawing. Many websites or books say that an even coat of "Chinese White" watercolor or gouache paint is an acceptable preparation for the paper. Chinese White paint or probably as well my favorite white watercolor paint, Winsor and Newton's Designer's Gouache, is made up of white pigment and gum arabic. Gouache has other ingredients that to date, I have not been able to eeek out of the people at Winsor and Newton. However, there are subtle differences in the reaction of the metal to the different paints.
Paint made with zinc oxide as a pigment (Chinese White) will allow a faster darkening of areas as the initial lines are darker. Titanium white, another white pigment in many paints, accepts an initial lighter mark from the metal, and therefore will also affect the execution of the drawing. The graininess of the pigments is what creates the lightly abrasive surface that allows the metal to leave a mark, but the type of white used will affect the amount of metal left on the surface. As well, there seems to be a slight chemical reaction in my use of copper on zinc white. Initial lines in copper are more blue on zinc white, and less blue on titanium white. I do not know yet if this difference will even out over time and the copper will actually oxidize to the same color.
My first inclination for long-term planning was to use a Clayboard ®- type product. Clayboard is a commercially prepared clay-surfaced board that is a fairly good substitute for my own hand-prepared traditional gesso panels. It is readily available, more convenient than preparing my own panels, and should have the abrasive-ness needed for metalpoint work. My thinking was that my work in silverpoint would be closer to my painting of icons: on carefully prepared boards, with great care in the execution. I am finding now that no matter what I use as a support for the drawings, it is not like painting icons, nor like ink work or watercolor. It is specifically different. As I experimented more with what I had already at hand, gouache on paper as a support is all I would really need to draw "correctly" with this medium.
At hand, I had a traditional gesso mix, Titanium white gouache, Zinc white gouache, rabbit-skin glue and Titanium white raw pigment.
A note before I continue regarding the preparing of paper: I am a very experienced pen and ink artist. I expected to use the same techniques in metalpoint drawing as I do in any of my pen and ink methods. I am finding, however that there are differences that may actually be called "complete" differences. Similarities are hatching and cross hatching, direct line shading, and rotating the point in small circles to shade an area. What may make these methods completely different from pen and ink is the way the prepared paper accepts the mark. When a mark is made with ink, some ink absorbs into the surface, and it can be manipulated to some extent, either by adding more ink over it with more lines, erasing the surface ink, or burnishing the surface to change the way the ink is received by the paper.
Metalpoint is different in that there is no absorption. The line or mark that is made always sits on the surface of the prepared paper. The atoms of the metal never penetrate the atoms of the paper surface. Build-up of tone is then reliant on whether or not additional metal will stay on top of metal marks already made. This fact means that great subtlety must be used when making each mark, each is a step to the next mark, more so than with ink. I can't really even say that graphite is similar, although it is in a chemical-property sense. Graphite seems to cling to itself in a different way, perhaps because of the chalks which make it up.
For those who are reading this page who want the fastest way to get started, here is what you need: Chinese White opaque watercolor paint or gouache, a good quality watercolor paper (no student grade that is less than the quality of Cotman watercolor paper), and yes, the metal point. My initial drawings are done in copper wire that I had in the house. I rounded the tip with a whet-stone and sandpaper. If you want to purchase a tip and holder, currently I have found two websites that offer silver tips: Silverpoint.com and Natural Pigments. My experience with Natural Pigments is long, and they are a great company. I recently contacted Silverpoint.com and plan on ordering from them soon.
Preparing paper with Gouache or Chinese White
Prepare your paper by painting a clean, even wash of the paint over the surface. I've been applying three or more thin coats, but two coats should suffice, painting first in one direction and then the second coat being applied in the other direction. The paper should be treated as watercolor paper that is being moistened. Tape the paper to a board before applying the paint, and let dry for 24 hours after all the paint is applied. Paint that is applied too thickly will crack if the paper is not mounted to a rigid support such as a panel or board.
In the above photo you can see the initial application of gouache paint. I have added a slight amount of yellow ochre dry pigment to the paint to tone the background areas of my paper.
Above, I have changed the tone of my paint to a pale grey-green. You can clearly see the directions of my brush strokes in applying the paint. Winsor and Newton Designer's Gouache paint dries almost completely without these lines, but I still apply the next coat in the opposite direction. Note: the addition of too much pigment to the white will probably affect how the metal reacts to the surface, because it is the Zinc or Titanium white that you are marking on. (For those used to making their own pigments or gesso, see below for using marble dust as an abrasive).
My papers above have five coats of paint on them, except for the top piece, which has four. I wanted to use up the paint I had mixed, and five coats should not affect my drawing. The first four coats were applied as shown further above. The fifth coat was "scumbled" on, to allow a more traditional look to the background surface.
Other surface options:
If you do some reading about metalpoint, you will find that originally it was used as a way to write or draw on sheep, goat, or calf skin for manuscripts. I like to complete my finished fine art pen and ink pieces on calf or sheep skin, so I am familiar with the properties of working on it. The layer of traditional size used in antiquity would have to be very evenly applied, and I believe would actually make the sheep skin less durable than if not treated with a preparation. However the added surface is needed in order to make a mark. They must have worked very carefully when this method was the "only" way it was done, and the finished pieces would be what I would describe as "delicate".
Then there is the method already described above, gouache or Chinese white paint applied to a good paper. I personally like to mount this paper to a board, so that I do not have to worry about the paper bending, and the gouache paint subsequently cracking.
Preparing paper with Rabbit Skin Glue and Marble Dust
Another method is to use a traditional size specific to this use. Generally this comprises rabbit-skin glue and white pigment. Traditional gesso "should" do this. I have traditional gesso that is a rabbit-skin glue, white chalk powder, and other ingredients It is the best traditional gesso that I have found to work with for oil painting or egg tempera and I absolutely love it. It is made by Gamblin , and the product is wonderful, the label and instructions are great, but it will not accept a mark from metalpoint. Hmmm. My guess is that the addition of gypsum to its ingredients affects the way metal interacts with the surface. One artist whose work I admire, Victor Koulbak, uses marble dust as a whiting agent. Below you will see how I applied that to as paper, much in the same way as above for the gouache preparation.
Rabbit skin glue and marble dust:
Ingredients used: Gamblin Rabbit Skin Glue, marble dust (available from Kremer Pigments or Natural Pigments or Dick Blick). The glue has to be soaked overnight, and then warmed. Follow the package directions for preparation of the glue. Rabbit skin glue can be refrigerated for a short time, so if you make more than you need, put it in a clean glass jar and keep it in the fridge. I would recommend using it within a week.
Ratio of marble dust to glue: I used 2 ounces of warm rabbit skin glue (in liquid form) to 1/2 ounce of marble dust. I made a test swatch before applying the preparation to my paper.
Below: the papers are taped to a board as shown above.
The glue and marble dust are mixed together with a brush. The glue must remain warm and the mix needs to be stirred continually during application, as the heavier marble dust settles in the glue. The more evenly the marble dust is applied, the better the surface.
Below is my test swatch. On the upper half of the paper, you can barely see the first layer of application. Very faintly on the bottom of the application are initial lines in copperpoint.
A couple of notes about applying any liquid to a paper surface: use a good "wash" brush to minimize lines between strokes. A lesser-weight paper will buckle more until it's dry, so taping it down is a must. Below is a sheet of my favorite sketch book paper, Aquabee Super Deluxe paper. It is lighter in weight than the Winsor and Newton 140 lb. hot press paper I use for finished pieces, and is buckling quite a bit as it dries.
Below is a photo of the Winsor and Newton 140 lb. hot press paper with the rabbit skin glue and marble dust preparation on it. As it dries, the areas that are still damp show as darker areas. Metal will not make a mark on damp paper, which is why it is best to let the paper dry for 24 hours. What doesn't show up in the photo is that the marble dust has true sparkles to it, because of it chemical formation it has and it truly adds the the beauty of the paper, even before any drawing.
Paper preparation cost comparisons:
(Prices are found as of this date, February 1, 2010)
Chinese White (zinc white and gum arabic) opaque watercolor paint should be under $3.00 per tube.
Winsor and Newton Designer's Gouache 32ml tube - approximately $15.00 (most economical if two coats are applied per sheet of paper).
Rabbit skin glue and marble dust: Rabbit skin glue is approximately $15.00 per pound, and marble dust is approximately $3.00 per pound. A pound of each would surface many drawings.
Golden Silverpoint / Drawing Ground: Approximately $12.00 per 8 ounce bottle. They state that two coats are best per paper, one coat is sufficient in their product video.
Advantages and disadvantages: Chinese White and Gouache paint preparations are the most convenient to apply. Rabbit skin glue and marble dust, for me, is the "most professional" preparation, as well as being very cost effective, but is not as convenient. I haven't yet tried Golden's ground because it seems expensive to me, and 8 ounces wouldn't last very long for someone working exclusively in metalpoint. However, it may be the preparation that combines professionalism and convenience overall, and if the aspect of expense is not a factor, may be the one ground anyone would need. I plan to try it in the future.
Paper storage
There's a great, inexpensive way to store un-mounted papers that have been prepared with a liquid preparation. I have found that even when taped to a board during application, papers will tend to bend when dry. One method of keeping them flat was to place them in-between / under my many (heavy) botanical illustration books. Then I was reminded that I have a flower press for pressing flowers. This works by increasing pressure between two boards by the means of tightening two straps over a period of days. It effectively presses flowers perfectly flat, but also will hold papers flat until use.
Below is a photo of my flower press that I paid about $10.00 for many years ago. A similar press could be made by hand very easily. There are two pieces of plywood, and two straps that closes with Velcro® for tightening. The flower press came with absorbent interleave papers for absorbing flower moisture, but I use wax paper to separate the individual prepared papers for metalpoint.