What is a one-sentence summary of the following article?
The most successful printing entrepreneurs start a printing business by finding a niche in a specialized area, such as digital printing. Instead of trying to be all things to all people, success is more attainable by targeting a need and fulfilling it. One of the best examples of this strategy can be seen by the success of franchise sign printing businesses, which target budget-minded business owners who only need occasional signs and banners, which can be spotty (inconsistent demand) or loaded with competition. They do not attempt to offer anything but quick-turnaround signs and leave brochures and envelope printing to traditional offset printing businesses. Realize that the niche for color printing and the better quality grade of printing may be in a certain number of dots per inch (DPI), which can be very demanding and tricky to match. Remember, as a business owner, you will be responsible for the timely completion of jobs to your customer’s satisfaction. Caution: Any verbal or written agreement like You [the printer] know what looks right, so you can okay the proofs for color and quality is loaded with the danger of customer rejecting the finished product. For example, they may require:  Product match, excellent quality – very precise color, hue, and tone for high end products. Color match, excellent quality – usually precise Process Matching System (PMS Colors) by screen values (tones created by dot sizes) of the 4 process colors (cyan, magenta, process yellow, and black). Or just pleasing color, of medium quality – which is not so precisely matched. Caution: that means pleasing to the customer, not to you. Commercial quality printing is probably a cut above desktop publishing, done in your-office (above typical office printer, copier, or duplicator quality). It requires sharp line art and text – fineness of line work does not vary from page to page, screen color or halftone detail is consistent. Any choice of printing process (or brand of paper) shown on a quote to your customer is for them to choose. No, you can not substitute a more profitable method or material. Unless they agree in writing to a change, they can demand that it be redone at your expense -- if you did not follow written specifications precisely.

Summary:
Find a niche within the printing industry. Familiarize yourself with the business standards. Be careful with your words.