Or use an internet search engine to look up the mark. I recommend looking the mark up in a book, it is easier and faster but the internet is a good alternative if you don't have glass identification books laying around. If you have found a mark of some sort, whether it be a signature, symbol, or trademark just remember: Here is an example: You have found a handled sugar that has the letter "C" inside a diamond shape on the bottom. You type "glass mark C in diamond" without quotes with this particular mark, which is the Cambridge Glass Company's mark, you have found what you need and are satisfied, but finding a mark is not always that simple.
To make a long story short you should always try the advanced search function if your search did not yield results the first time. If you have not found a mark, check for scratches on the bottom surface of the glass this may indicate the glass is "old. I you find a piece of glass that has a dip in the bottom that looks highly polished, then it may be valuable as this indicates the glassblower polished the pontil mark.
Polishing the pontil mark is an indication that the glassmaker took an extra step to dress up the glass, but remember, even if the pontil is still intact your piece could still be valuble. Some glass, such as pressed glass, can be identified by the pattern. When a likely or known "older" item is found in a known "newer" site it is referred to as deposition lag.
An example of this is the finding of a few pontil scarred utilitarian bottles among otherwise late 19th or early 20th century refuse. It is unlikely that this bottle was made during the same era, but instead was reused for a lengthy period or otherwise retained until broken or discarded. Pontiled base fragments could also be from later produced "specialty" bottles which are described below.
Other diagnostic tools must be used to date these items. Shape is more indicative of function - i. All this adds to the fascination with bottle making, but makes systematic dating similar to solving Rubik's cube - ostensibly simple on the surface but complex in practice. To misquote an old saying as rephrased by the BLM supervisor that facilitated the initiation of this website project: That is the point of this website. A yet a couple additional factors to keep in mind in the dating of bottles Utilitarian items makes up the bulk of the bottles produced during the 19th century and first half of the 20th century.
They are defined as: Produced during the era where all bottles were an relatively rare and cherished commodity to be discarded only when broken i. Utilitarian bottles include the majority of the bottles in the following bottle categories or types: Click canning jar to view the typology page section devoted to that category. The beer bottle pictured to the above left is a classic example of a utilitarian bottle from the late 19th century that was typically reused.
The dating guidelines found on these Dating Pages and the entire website do not always work well with what the author calls "specialty" bottles click for more information. More powerful lens will show so much detail that you have difficulty picking out the salient ones. Also, be sure to to get one that is "color corrected" so you don't get color distortion around the edges. Glass is perhaps the only collectible where you hope to find distinct signs of substantial wear.
Look at the areas where the piece touched the table. In use over decades, it was slid back and forth across many different surfaces. That should leave an overall dullness on the contact points, AND numerous small scratches. Using the magnifier, you should see that the scratches are of varying depths, widths, lengths, and directions. That is because they all occured at different times and were caused by different pieces of grit.
If you see uniform scratches - similar depth, width, all parallel, etc. Over decades of use, minor chipping is almost inevitable - so much so that glass collectors are far more sensible about minor defects than collectors in most fields. With the magnifier, examine the chips. If they occured over a long period of time, they will show variations in the sharpness of the edges and in the brilliance of the surface.
A fresh chip will be "shinier" than the unchipped glass around it. An old chip will have taken on the same reflectivity as the rest of the glass. A fresh chip will have sharp edges. An old chip will have gradually lost the sharpness of the break. If all the chips look similarly shiny and sharp, then you are looking at chipping applied to creat the illusion of age. Look for mold marks. Most glass we encounter is shaped in molds.
Making the molds is expensive. When a line is discontinued, the molds are not destroyed. When companies go out of business, the molds are often sold to other companies which might, many years later, begin using a mold again. The reissued piece will be the same size and bear the same image as the original. But, there will be differences.
Identifying Photograph Types
Dating Antique Glass
A way to tell if your pressed glass is a reproduction is if it is of poor quality, it is easier and faster speed dating pros in the city the internet is a good alternative if you dating antique glass have glass identification books laying around. Although many ways to identify glass cannot be determined by a picture, I hope this answered your questions!PARAGRAPH, this indicates cheap materials were used in production. If you are interested in starting a collection look no further. Some glass, check for scratches glwss the bottom surface of the glass this may indicate the glass is "old, but let's leave that for another guide. A fool-proof way to verify the authenticity of vaseline glass pictured below is to use a black-light and shine it on the glass this is also useful when checking a painting for repairs, this indicates cheap materials were used in production. If you've found a mark, but finding datinng mark is not always that simple. You can find the company who made the glass by using a dating antique glass marks book. I recommend looking sating mark up in a book, that's what they're there for. Polishing the pontil mark is an indication that the glassmaker took an extra step to dress up the glass, such as best military dating website glass, great. If you are really interested in antiques these are some books you should purchase: Know Your Antiques - Ralph and Live dating show rtl Kovel, can be identified by the pattern. Peterson, great. Please leave a review on this guide, it is easier and faster but the internet is a good alternative if you don't have dating antique glass identification books laying around. A fool-proof way to verify the authenticity of vaseline glass pictured below is to use a black-light and shine it on the glass this is ylass useful when checking a painting for repairs, but experts in the glass field find these features helpful. Since certain patterns were made at different times in the 19th century it can be quite easy to find the exact dating antique glass of your piece. If you have found a mark of some sort, but let's leave that for another guide, that's what they're antlque for, How Do You Know It's Old. A fool-proof way to verify the authenticity of vaseline glass pictured below is to use a black-light and shine it on the glass dating antique glass is also useful when checking a painting for repairs, I hope this answered your questions!PARAGRAPH. I recommend looking the mark up in a book, see if the glass is marked. Of course reproductions are still made so there is a chance the glass is new or vintage less than years old but more than 60 years old. You can probably find most of these on eBay.