Tattooing can be either temporary with color-permeated designs put on with water or it can be permanently applied to the skin with ink and needles. Tattooing is a procedure that can be hazardous to your health.
Tattoo removal is less hazardous, but requires medical expertise.
The article is old but the information in not. Construction equipment you see at construction sites has problems of initial costs, operating and maintenance costs, life expectancy, and depreciation information specifically geared to your part of the United States. Hope this helps next time you have to dig for answers to construction questions. The temperature in outer space, the weight of a satellite in space, explanation of a launch window, a 10th planet, the personal hygiene facilities, and other similar questions are what get your local high school students extra points in scavenger hunts initiated by the teachers. NASA publication PMS-007B is only 12 pages but it is full of questions and answers.