The Art of Sandblasting: Machine, Abrasive, and the Maker's Hand

Sandblasting is the process of driving abrasive particles against a surface using compressed air. It was not invented for pipes: Benjamin Chew Tilghman's American patent (No. 108408) of 18 October 1870 aimed to cut, engrave, and clean stone, glass, and metal. Its application to wood — let alone a pipe stummel — took roughly half a century longer; once it arrived, it stopped being a mere cleaning method and became a craft with its own standards.

Why a Stummel Gets Sandblasted

The first reasons are practical. If a block has a sand mark, a fine crack, or an unevenly staining color patch, blasting the surface is a faster fix than reworking the stummel; because the process removes material from the wood, it also trims a bit of weight from the finished pipe. The resulting judgment that "a sandblasted pipe is a flawed pipe" is considered too sweeping; sandblasting has long stood as a finishing choice in its own right.

The Dunhill Patent and the Priority Debate

The figure who made sandblasting a classic in pipe making is Alfred Dunhill. Records credit the first batch of Algerian briar he bought in 1914 — after opening his tobacconist's shop on Duke Street in London's St James's in 1907 — with causing trouble on a smooth surface because of its softness, and thereby setting off the search. The British patent for the process was granted in 1918, its American counterpart in 1920.

What the patent protects isn't the blasting itself but the preparation that accompanies it. Per the specification, briar is soaked in mineral or vegetable oil for weeks, then left under heat for days, with the oil seeping to the surface skimmed off regularly; only after this is the blasting done, the cycle repeated until the desired relief appears. The rationale is durability, not decoration: wood that hasn't been oil-treated is said to be prone to cracking during blasting. The popular narrative crediting Dunhill as the first maker to use sandblasting in pipes is disputed; one independently unverified researcher's view points to the Barling "Niblick" model, dated to mid-1917, as a possible precursor.

Abrasive and Machine

The first variable shaping the result is the type of grain. Silica sand, glass beads, steel shot, garnet, and ground walnut shell are all common options; since their hardness and grain shape differ, each leaves a different texture. It's routine for a material that gives the desired look in one workshop to fail to reproduce that same result in another.

The second variable is the machine setup. In a suction (vacuum) setup, compressed air creates suction inside the gun that draws the abrasive in; since pressure is limited to roughly one atmosphere, it doesn't produce deep texture. In a pressure setup, the abrasive is held under air pressure inside a sealed vessel; the flow is far more forceful, and pressure is adjustable. Workshops known for deep, sharp sandblasts, such as Ashton, are known to work with this second setup.

In mass production there's a third route: stummels are loaded into a wire drum, and a fixed nozzle blasts for hours while the drum turns. Because the pieces rub against each other and pressure is kept relatively low, edges round off. A sandblasted stummel with distinct, sharp edges is taken as a sign of hand work; soft, rounded ones point to the drum.

Wood, Cut, and Curing

The underlying wood also shapes the result. It's accepted that the softness of Algerian briar gave early sandblasts extra depth, and that surfaces from later generations grew shallower once this source dried up after the 1960s; this view rests on collector observation rather than measurement. How the block is cut matters too: blocks cut for straight grain give a ring-patterned surface when blasted, while cross-grained blocks give a more variable pattern. Makers don't agree on curing method (air-drying, kiln-drying, oil curing, steaming); some workshops argue their method improves the result directly, while others report seeing no meaningful difference.

Sandblasting therefore can't be reduced to a recipe. The same machine, same pressure, and same abrasive can give two different surfaces on two different blocks; which combination works is workshop-specific and is learned largely through trial. That's also why craft is the most debated aspect among the surface finishes, with sandblasting at the center of it.