The following terms are specific to airbrush technique and refer to
airbrush types, methods of propelling air, processes, and tools. An
understanding of these will make airbrushing clearer to the novice.
internal mix—a type of airbrush where the paint is atomized
(mixed with air) inside the airbrush tip and results in a soft spray.
external mix—a type of airbrush where the paint is atomized
(mixed with air) outside the airbrush tip and results in a coarse spray.
single action—a method of activating a specific airbrush whereby
depressing the trigger delivers both air and paint simultaneously; and a
preset spray width is produced.
dual or double action—a method of activating a specific airbrush
whereby depressing the trigger delivers air and then drawing back on the
trigger releases paint; and spray width can be altered contiuously.
bottom feed—a siphon feed system where paint is drawn up into the
airbrush from a reservoir (jar or color cup) mounted underneath.
side feed—a siphon feed system where paint is drawn into the
airbrush from a reservoir (color cup) mounted on the side.
gravity feed—a system where paint is drawn down into the airbrush
from a reservoir mounted on top.
air source—a device or unit containing, or capable of producing,
pressurized air (compressor, carbonic gas tank, propellant can).
cfm—a measurement of air flow: cubic feet per minute.
moisture filter—a device attached to either the compressor or the
airbrush hose to remove water from air.
oil filter—a device attached to the compressor to remove oil from
the air source.
psi—a measurement of air pressure: pounds per square inch.
air regulator—a device attached to a compressor to adjust air pressure (psi).
frisket film—a transparent, self adhering stencil material with a
peel off backing used to create exact or hard edges.
overspray—sprayed medium that drifts above and beyond the intended focus
of the spray.
dagger stroke—a stroke used in freehand
airbrushing that goes from wide to narrow in one pass.
stipple—the controlled spraying of dots that
results in a textured appearance. (The lower the air pressure, the
larger the dots.)
AirbrushTalk
Air brush technique lesson written by Arttalk.com
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Lesson 2
Soap Making For Beginners – Melt And Pour Process
As you will learn, soap making can be simple or complex. Some people enjoy the challenge of going all out professionally, which is fine. However, other people simply want to make soap for personal use or to give as an occasional gift.
Keep in mind that safety precautions should still be followed because soap becomes dangerously hot when melted, regardless of the skill level involved. Here, we will discuss easy melt and pour techniques, perfect for the novice or skilled soap maker!
First, keep in mind that most handmade soap is made from glycerin. When you purchase store-bought soap, the majority of the glycerin has been processed out. Therefore, when you make your own soap, you have a great opportunity to create something that is glycerin rich and soft.
Although “glycerin” is usually clear, with today’s colors and fragrances, you can create beautiful soaps that not only make your skin soft but also look great. With glycerin, because it is a humectant, moisture is drawn out of itself. That means when you use glycerin soap while bathing, a very fine layer will stay on the skin, adding moisture.
BUYING SOAP
To go through the easy melt and pour method, you want to stop by your soap-making supply or hobby store, or online soap supply store. There, you will find large blocks of clear soap. These vary in size and type. Remember, the prices will vary depending on where you live and the store or business where you buy.
Regardless, the following are the types of melt and pour soaps you would need to make your homemade soap.
Hemp Glycerin Soap
This type of glycerin is great for the “melt and pour” system, creating semi transparent soap with the benefit of hemp. Hemp oil is rich with essential fatty acids, enzymes, Omega 3 and 6, and vitamins A, D, & E. When buying hemp glycerin, you should look for blocks that are around 20% glycerin, is alcohol free, and free of any harsh detergents.
Typically, you will find 11-pound slabs, which will make approximately 44 bars of soap, each four ounces. If that is too much, you might try to find smaller slabs or go in with another soap maker to split the soap. This size slab will average $40.
Olive Oil Soap
Olive oil soap is semi-transparent with just a slight tan color. However, the benefits and features are very close to that of hemp glycerin. The only difference is that instead of hemp, olive oil is used. When buying, look for cold pressed olive oil that contains essential fatty acids, minerals, vitamins, and as close to 20% glycerin as possible. Again, an 11-pound slab for olive oil soap runs around $40.
Clear Glycerin Soap
This type of soap is transparent and has low shrinkage qualities. In addition, clear glycerin soap has very little problem with discoloration. This soap is vegetable derived and an excellent choice for “melt and pour” soap bars. You can add color or fragrance easily and the soap will leave your skin feeling soft and smooth.
Clear glycerin soap is also a great choice for making soap with multiple layers, novelty soaps (those with toys, flowers, or other objects inside), and yet the clarity is exactly what you would buy from your favorite boutique. If you want a good daily soap, one that is fun for the kids, and makes an excellent gift, clear glycerin is it.
Goat’s Milk Glycerin Soap
This type of soap originates from the beautiful Rocky Mountains. The feel is creamy and rich, and very luxurious. The appearance of this soap is off white. Many people shy away from goat’s milk glycerin because of the name but you will find that it has no fragrance and actually takes both color and fragrance perfectly.
If you want soap that is natural, this is a great choice. Typically, goat’s milk glycerin soap is slightly higher than the other types of soaps but still very affordable and well worth the investment.
Melt and Pour SOAP MAKING Equipment and Ingredients
The great thing about using melt and pour is that you can use equipment you typically have on hand. With this method, you can use the base of a double boiler or your microwave oven.
Keep in mind that if you choose the microwave, the bowl with the soap substance will need to be covered with plastic wrap to keep it from splattering but more importantly, to help keep the excess moisture from evaporating. For the microwave method, you would melt the base soap on high for about one minute, stirring in the remaining pieces not yet melted.
For the double boiler option, bring the water to a boil. Then, add your melt and pour soap of choice, cover, and leave on low. This will take quite some time to melt so about every 10 minutes, check the base to see if it is melted. If you like, you can stir occasionally to ensure an even melt.
Fragrance
For both methods of melt and pour, if you want to add in fragrance, once the base soap has melted, then you would add the fragrance oil. Be sure the fragrance is mixed in completely and that the base of the soap does not have a cloudy appearance.
Although you can use more or less fragrance according to personal preference, typically a good rule to follow is to use .25 ounces to every one pound of soap base. In addition to fragrances, you can also use essential oils.
Color
Now for the color, if you want to create colored soap, add approximately one-eighth teaspoon to one-quarter teaspoon mica in with the melting soap base, making sure to mix in it well.
If any bubbles form on top of the soap, you can leave them for design effect or spray them with rubbing alcohol. If you want to use food coloring, start with just one drop to the melted base, stirring well. Then, you can add one additional drop until you find the color of preference.
After the fragrance and color have been added to the soap base, pour the melted base into the mold of your choice. Again, if you want to remove any bubbles that will settle on top, spray them with rubbing alcohol. After the soap has hardened, generally a few hours, you can use it and enjoy!
Cost
As you can see, to make your own soap at home, you would pay around $40 for the slab of base, a few dollars for fragrance, a few dollars for coloring, and that is about it. The process is very cost effective, fun, and you end up with exactly the type of soap you love most.
Most people figure that one bar of homemade soap will average .50, far less than you would pay elsewhere. In addition, you can add in special items or effects to jazz things up.
Making soap using the melt and pour process is easy and fun… and makes for very inexpensive soap. Not only is it great for making your own soap, but it makes for truly unique and creative gifts.
Dave Cushion is the creator of the very popular book "Soap Making Made Simple!" To get additional soap making tips, go to http://www.soap-making-made-simple.com and learn much more about this very fun and useful craft.
Lesson 3
Egg Tempera
Perhaps you have read about some of the famous artists who use egg tempera and wondered what egg tempera is and how it is different from the simple tempera paints used by fledgling artists. If so, you are not alone. Egg tempera is a unique type of painting material. Today, popularity of the material is not widespread, but it was the most widely used material before the advent of quality oil paints. For those artists who have embraced it, artists of both old and contemporary times, there is no media that begins to approach the look of that achieved with egg tempera. It is rich, exceedingly permanent paint that can be applied in opaque or translucent layers. Two of the most recognized egg tempera artists of contemporary times are Marc Chagall (1887-1985) and Andrew Wyeth (1917- ).
There are a few commercially made egg temperas in tube form that follow the standards and formulation of the classic egg tempera used by artists since the Renaissance. Considering that most of the religious panels painted between the 12th and 15th centuries were done in egg tempera, those formulas have a rich history. These prepared egg tempera paints work well with acrylic gessoed panels.
Contemporary artists, those that are purists, prefer to create their own mixtures of pigments for this media. There is a strong satisfaction in the actual creation of your paint, no matter what the formula might be. And with egg tempera, once you create your paint, you have to use it immediately because there are no preservatives in the mixture. Pigments used should be of the highest quality available, and a full color spectrum is available through art supply stores. Formulas vary, but there are three constants in the recipe: egg yolk, pigment and distilled water. (Simple tempera contains no yolk and doesn't require distilled water.)
To prepare the yolk for use, crack an eggshell into halves; then shift the yolk from shell to shell, removing as much of the white as possible. (Or you can use an egg separator, available in the housewares section of supermarkets or stores.) Discard the white and "dry" the yolk. One way is to carefully pool the yolk in the palm of one hand, then shift to the other palm. Dry the first palm. Shift to the dry palm, and repeat the shift/dry steps until the skin on the yolk starts to get "leathery." You can also lay the yolk onto paper toweling and carefully dry off any remaining fluid. Pinch the yolk gently between the thumb and forefinger of one hand, hold the yolk above a clean mixing/storage jar, and then pierce the yolk with a blade. Catch the yolk fluid and use it in combination with dry pigments and water to create your palette of colors.
In order for the dry pigments to mix readily with the yolk, it may be necessary to create a paste of dry pigment and distilled water and then add the yolk. This will help eliminate lumps of unmixed powder pigment. Add pigment paste in small portions to egg (equal portions of each); then add small quantities of water to create a paint of workable texture. The correct consistency is that of thick oil paint. Note: When using any dry pigments, always exercise caution - do not inhale the powder and do wear disposable gloves. When working with the paints, always wash your hands before eating or smoking.
The surface onto which you apply egg tempera needs to be "accepting" of the pigment and absorbent by nature. Oil gessoed panels work best because they grip the pigment and offer a dry surface on which to lay the yolk mixture. But this absorbency compounds the fast drying properties of the mixture, so one must work quickly. A technique used by many to overcome this fast drying is to create planes of color using hatching and crosshatching. These two application methods offer a way to achieve varied degrees of tone and depth.
Some manufacturers offer panels coated with an oil-based gesso, but they are more costly. Acrylic gesso is unsuitable for handmade egg tempera, so you may want to create your own panels on any one of several substrates. The most popular are Masonite and plywood, although historically egg tempera was done on solid wood panels. Apply oil gesso in overlapping layers, allowing each to dry between coats. Do at least three crisscrossing layers. Scrape with a sharp blade or sand the final coat smooth to remove all brush marks and to create as smooth a surface as possible. A spare utility knife blade can be scraped over the surface as can a window cleaning razor knife. Use care when scraping and try to avoid pits and cuts. NOTE: Claybord is a panel created and ready to go with a soft, smooth gessoed surface perfect for egg tempera and is available wherever art materials are sold.
Tips:
--Some pigments have a higher absorbency than others. Test your dry pigments in small batches.
--Avoid storage for more than a couple days and always place the paint in the refrigerator between painting sessions.
--Create a reference card file to record the quantities of pigment and the resulting color. Color tests created by painting grids of measured quantities of combined colors are very helpful in recapturing a tone or shade used at another time.
--As an alternative ground, use heavy watercolor paper that has been coated with two to three even coats of rabbit skin glue.
--Wash and condition brushes well between painting sessions.
The Society of Tempera Painters is dedicated to the improvement of the art of tempera painting by the interchange of the knowledge and experience of the members. See their informative web site at www.eggtempera.com.
Egg Tempera Painting Lesson Written by Arttalk.com
Click on any of these links to view previously published art lessons:
- Printing Lessons
- Airbrush Lessons
- Framing Lessons
- Decorative Art Lessons
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The official disclaimer:.... These web art lessons are listed as a convenience to my visitors. If you use these lessons, I can take no responsibility and give no guarantees, warranties or representations, implied or otherwise, for the content or accuracy of these lessons.
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