1 : a collection of persons or things : gathering. 2 : the act of assembling : the state of being assembled. 3a : an artistic composition made from scraps, junk, and odds and ends (as of paper, cloth, wood, stone, or metal)

Street art covers all manner of media: paint, paste-ups, stencils, sculpture, yarn bombing, stickers, etc. Either way, what it comes down to is that the making of both is usually surreptitious and guerilla-style; done under pseudonym; often uninvited and therefore illegal; and, always, outside.

Johann Dieter Wassmann

Subtractive manufacturing is a process by which 3D objects are constructed by successively cutting material away from a solid block of material. Subtractive manufacturing can be done by manually cutting the material but is most typically done with a CNC Machine

Subtractive manufacturing or subtractive fabrication involves cutting away from a solid block of material. It could be a block of, for example, metal, plastic, or wood. A milling machine cutting/hollowing out a piece of metal or plastic is an example of subtractive manufacturing.

Understanding the Seven Types of Additive Manufacturing

• Binder jetting.
• Directed Energy Deposition.
• Powder Bed Fusion.
• Sheet Lamination.
• Material Extrusion.
• Material Jetting.
• Vat Photo Polymerization.

Subtractive manufacturing is an umbrella term for various controlled machining and material removal processes that start with solid blocks, bars, rods of plastic, metal, or other materials that are shaped by removing material through cutting, boring, drilling, and grinding.

Traditional, complex parts require more manufacturing steps, along with more material and labor costs. The time to create and assemble them is longer, and it increases inventory. There’s a better way. With additive manufacturing, you can print the assembly as a single piece, saving money and time from start to finish.

The term “3D printing” is increasingly used as a synonym for additive manufacturing. For example, instead of milling a workpiece from a solid block, additive manufacturing builds the part up layer by layer from material supplied as a fine powder. Various metals, plastics and composite materials can be used.

One of the more limiting and therefore less-used materials in 3D printing is resin. Compared to other 3D-applicable materials, resin offers limited flexibility and strength.

What are the materials used to print 3D objects? Many different materials can be used for 3D printing, such as ABS plastic, PLA, polyamide (nylon), glass filled polyamide, stereolithography materials (epoxy resins), silver, titanium, steel, wax, photopolymers and polycarbonate.

The strongest 3D printing materials are ABS, TPU, PET-G, PA, PAHT CF15, PP, and PP GF30. The strength of these filaments vary, as some are more impact resistant, while others are structurally strong or even fatigue resistant. Let’s dive into the unique characteristics of each filament

A 25-year-old machinist in Pennsylvania has figured out how to make bullets that work in a 3D-printed gun. You can make your own 3D-printed gun, but, until now, shooting it was another matter. There’s a fundamental mismatch between the typically plastic makeup of a 3D-printed object and the explosive nature of ammo

As 3D printing has become cheap, easy, and reliable enough to welcome into the home, Lego enthusiasts are now using 3D printers to make their own Lego pieces. There are plenty of 3D printers available that can print using ABS; this is the same plastic that is used to make genuine Lego.

Kevlar 3D Printing Formed from the combination of two materials, composite parts are incredibly strong and versatile. Our unique fabrication process enables you to print parts that are an order of magnitude stiffer and stronger than typical 3D printed objects

The Desktop Metal Studio system costs $120,000, will ship in September, and includes a printer and sintering furnace. Offices or labs can also rent the system for $3,250 a month. The Desktop Metal Production system, which will ship in 2018, costs $420,000 to purchase outright

The Desktop Metal Studio 3D printer is priced at $49,900. Further details about both systems are available on the Desktop Metal website here