Pressed glass with raindrop pattern12/19/2023 ![]() The original scope of this article was to document Victorian and Edwardian glass textures but has since grown to also include glass patterns right up to modern times. Using old archives, along with our team’s experience and trade contacts, this page is our attempt to record all of those early textured glass designs. Many heritage buildings across the globe still contain some fine examples of these interesting, durable and varied glass patterns. ![]() It is made by embossing textures into the surface of the hot glass sheets. Victorian glass makers introduced figured rolled window glass, also known as ‘patent rolled figured’ glass, frosted glass, fancy glass, textured glass, art glass or obscured glass. How to identify old obscured window glass patterns and textures: British, American and Australian decorative, frosted & fancy rolled glass gallery. □Īny further information or glass samples you might have, that help to complete the collection, are most welcome please email Simon. We have done the right thing by not restricting your right-clicking or watermarking everything… be nice and link back. Please include a link to this article if sharing it or posting elsewhere, either in part or full This article has taken hundreds of hours to compile and is still regularly being updated as new information is unearthed. We do not sell old glass, we undertook this research for the public record’ and to ensure the history of these interesting glasses was open to anybody with an interest.įeel free to use or share what you find here, but do the right thing. Hit ‘Control+F’ on your keyboard to search for keywords. Click them for larger images presented as a slideshow. That main article looks at all of the other decorative window glasses as well as the evolution of clear flat window glass.Īustralian Patterned Glass was all imported before 1931.įollowing are a lot of images galleries that will ‘lazy load’ as you scroll down. This page is a supplement to our main article: History Of Architectural Glass For Windows. This article has grown to become more ‘book’ than ‘article’ and so we have provided a quick reference ‘Spotters Guide’ version of this page which can be found here: Patterned Glass Id Gallery – (the glass galleries only. Over 200 rolled window glass designs are documented below, with the focus being on the first 50 years (1890 -1940), although more recent glasses are also well documented. ![]() The various designs on figured rolled glass are mainly intended to diffuse and distribute light.” “The term ” rolled glass ‘ refers commercially to glass whose surface or surfaces, by means of a rolling process, are ribbed, fluted, or otherwise impressed with patterns or designs. The textured surface obscures the vision without impairing the transmission of daylight. Today this glass is almost universally used where both daylight and privacy are required but in the past, these glasses added texture and colour to leaded light windows. The various patterns in which this glass has been manufactured are documented in this article and they range from simple finishes to elaborate designs, giving a variety of effects. (2001a,b) developed algorithms for retrieving rain rate ( R) as well as D o, N wand musing β e f f in combination with the measurement pair ( Z h, Z dr).As the name implies, Figured Rolled Glass is an architectural glass having a figured or patterned surface impressed by rollers during the process of manufacture. The slope of β e f f such that the same relation between K dp / N wand D o is preserved on average. Instead it pulls apart when it grows to around 4 millimeters or more. This time, the surface tension loses and the large raindrop ceases to exist. Once the size of a raindrop gets too large, it will eventually break apart in the atmosphere back into smaller drops. The surface tension at the top allows the raindrop to remain more spherical while the bottom gets more flattened out.Įven as a raindrop is falling, it will often collide with other raindrops and increase in size. At the top, small air circulation disturbances create less air pressure. ![]() The reason is due to their speed falling through the atmosphere.Īir flow on the bottom of the water drop is greater than the airflow at the top. Flattened on the bottom and with a curved dome top, raindrops are anything but the classic tear shape. The raindrop becomes more like the top half of a hamburger bun. The reason is the flow of air around the drop.Īs the raindrop falls, it lose that rounded shape. On smaller raindrops, the surface tension is stronger than in larger drops. The cause is the weak hydrogen bonds that occur between water molecules. ![]() This surface tension is the "skin" of a body of water that makes the molecules stick together. Raindrops start to form in a roughly spherical structure due to the surface tension of water. High in the atmosphere, water collects on dust and smoke particles in clouds. ![]()
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |