A three round liner or five round liner (3RL or 5RL) is the most common but it does depend on the look you are after and the overall effect it has on the tattoo, the colours involved, the shading in the colours if any etc. One liners are also available and used for super fine lines like in portrait eyelashes etc. For tribals and the like it won't matter too much but better with a 5RL so that you can use it to fill the corners before you begin with the shader.
ya, most likely, they use a needle
Most tattoo needles are made of some grade of stainless steel. Surgical stainless steel is very common in tattooing needles.
Tattoo supplies are used to create tattoos. Tattoos can be made using a needle and ink, which is injected into the skin by pricking it with the needle. There are many different types of tattoo needles that may be used depending on the desired effect. The most common type of needle is called an autoclave machine or air-driven machine because they both use compressed air to power them. This helps provide more consistent pressure for even better results when creating tattoos.
It depends on the tattoo shop you would get it done at. Most tattoo shops have a minimus price (anywhere from $50 - $100) because you have to pay for a new needle, tattoo ink, etc. If it's a very small tattoo, most shops will do it for the minimum cost.
For the most common size that you would be doing it in. Line it with a 3RL, and then do your edges with 5RS. Then do the middle fill with a 15RS. The bigger the letters, the bigger the shade needle size and in some instances, the liner as well.
The German flag
yakuza, or lotus
You can get a butterfly tattoo at any local tattoo artist shop. This tattoo is the most common tattoo and you will find many examples of the artwork on the wall and in the tattoo artist's portfolio.
Having a tattoo anywhere hurts - its a needle marking your flesh. Now imagine your most sensitive area. Shove a needle in there?
technically yes, you could scar the body in a designed manner. But no, you cannot really get a tattoo with pen ink. You will most likely get ink poisoning
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How long is a piece of string? It depends on who and where you get it from, how much detail is in it, how large you are, etc. Most tattoo artists charge by the hour and this can vary widely depending on the tattoo artist skill and popularity. Your best bet is to into a few tattoo artists and ask them.