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Pontil scar on the base of a free-blown glass bowl. A pontil mark or punt mark is the scar where the pontil, punty or punt was broken from a work of blown glass.The presence of such a scar indicates that a glass bottle or bowl was blown freehand, while the absence of a punt mark suggests either that the mark has been obliterated or that the work was mold-blown.
A copper retort A glass retort. In a chemistry laboratory, a retort is a device used for distillation or dry distillation of substances. It consists of a spherical vessel with a long downward-pointing neck. The liquid to be distilled is placed in the vessel and heated.
The necks of traditional Florence flasks often do not have a ground glass joint like modern round bottom flasks do. Round-bottom flasks are used more commonly by professional chemists than Florence flasks. Retort: A spherical vessel with a long downward-pointing neck, specially used for distillation or dry distillation of substances.
Came strips are 4 to 6 feet in length. The came strips can be a leaf, channel or heart came: [3] [4] "The leaf is the surface on either side of the came that overlaps the edges of the glass and is left exposed once the panel has been assembled. It has either a flat or rounded profile and its width is the measurement given when a came size is ...
Like wound closure strips, butterfly closures do not require a medical professional to apply and can result in improved cosmetic outcomes for small wounds, compared to surgical sutures. Waterproof closure strips: Steri-Strips are paper-based, so durability and usage can be compromised if they get wet, requiring dryness and precision. But some ...
Whitening pens and strips are be super pricey. Whenever Crest Whitestrips go on sale, they tend to fly off the shelves. Whitening solutions go a long way, especially when you can nab them at a ...
Retort stand. In chemistry, a retort stand, also called a clamp stand, [1] a ring stand, [2] or a support stand, [3] is a piece of scientific equipment intended to support other pieces of equipment and glassware — for instance, burettes, test tubes and flasks. [4] The typical ring stand consists of a heavy base and a vertical rod, both ...
Image credits: mark_parisi_otm Bored Panda spoke with Mark Parisi to hear his thoughts on comics and his creative process. When asked what makes comics special compared to other types of ...