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This tape has been referred to as ''The most important''; of the 4-part series. Even if you are not interested in the history of the period (Vol. 1), if you don't care how they made it (Vol. 2), and you are not concerned about how to buy it (Vol. 3) let us assume you own some glass that needs preservation and protections.
You will learn about appraisals (not always called for), restoration (not always called for), insurance (not always called for), and proper care and cleaning (always called for). With regards to care and cleaning, you will learn cut glass has only two enemies and how to avoid each. Along the way you will learn how dealers keep their glass so bright and the strange, but true, reason that dust doesn't cling to old glass.
Dorothy Daniels tells in her 1950 book about stresses in glass from improper annealing procedures. You will learn which pieces are most likely to contain stresses and to shatter during restoration. There is a device for detecting stresses and why, prior to restoration work on a very rare and valuable piece, it is advised to have this test done. This is information that has never appeared in any publication.
Among subjects covered: getting stains out of bottles and vases, how to know when restoration is called for, when insurance coverage is called for, and an appraisal is called for, how to photograph your glass without any shadows, how to guard against earthquake damage if you are in a susceptible area and how long-term storage can damage your glass if it is wrapped in the wrong materials. Very little of the information on this video is available anywhere else to help you preserve your investment. | 
