◆ cloth, wax, needles, thread ◆ mistakes that taught them ◆
How a pack actually gets built.
The front-of-house story on the index page tells you who I am and where the shop is. This page tells you how the work gets done. Not in the smooth-edited way. In the way I'd explain it at the bench if you stopped in to watch, which a few folks have done, most of whom ended up sweeping up.
◆ 01 ◆Cloth: 14oz duck, off the Gardner Mill
The cloth comes in by the bolt from a weaver back east I've worked with since 2011. I won't say their name — they don't take the attention well and they don't need the work — but the short story is: a five-generation New England outfit that still weaves cotton duck on shuttle looms older than anyone currently employed there. The weave is a plain-woven double-ply duck at 14oz per square yard, natural (unbleached) off the loom. Bolts arrive on 60-yard rolls wrapped in brown kraft. Freight is a small pallet, four or five bolts at a time, maybe three pallets a year.
I inspect every bolt as it comes in. Run it out flat across the cutting table, eye down the selvedge for any slub or drop-weave the mill's inspectors missed (rarely more than one per bolt; they're thorough folks). Any flaw gets marked with a chalk square and that square gets cut around — the flawed piece goes into the offcut bin for Possibles Pouches. Nothing wastes. Nothing lies about itself.
◆ 02 ◆The wax blend, cooked on a hot plate
Every bolt gets waxed in the shop before it gets cut. Factory pre-waxed duck is available. I don't use it. Factory wax is a petroleum blend laid on by roller, which hides the weave, smells faintly of refinery, and — most damning — doesn't rebond when you iron a worn patch. Shop-waxed cloth does. That matters for the lifetime-repair promise.
The blend is 70% paraffin, 30% beeswax, cooked in an iron pot on a converted camp stove. Paraffin comes from a candle-supply jobber in Denver in 11-lb slabs. Beeswax comes from the Hogg apiary two valleys over, $14 a pound when they can spare it. I melt the paraffin first, stir in the beeswax once the temperature's steady at around 150°F, and pour the mix into a shallow iron bread pan to cool into a bar. Each bar lasts about four yards of cloth.
Application is the slow part: I rub the bar into the flat-laid cloth with a cedar paddle, pressing the wax into the weave with long diagonal passes. Then I come through with a flat iron on medium heat and a heat gun for the corners, working the wax in until the cloth turns a shade darker and takes on that faintly sticky quality that means it's bonded. A full bolt takes the better part of a day. The shop smells like a candle factory. I like this day.
◆ 03 ◆Patterns, chalk, and the round knife
I don't use a CAD file or a laser cutter. Never have. There are fifteen pattern templates, cut from heavy chipboard, hanging on sixteen-penny nails over the cutting table, each labeled in grease pencil. Some of them go back to 2011. I chalk around the template onto the waxed cloth, then cut the line with a Westbrook saddler's round knife (the #70 pattern, made by a forge in the Alleghenies) that I keep sharp on a leather strop with green compound every Monday morning.
The cuts are marked with 1/4" seam allowance inside the chalk line for structural seams, 3/8" for bound edges, and nothing extra for cut-and-fold hems, which get folded right at the chalk. Every cut piece goes onto a labeled hook on the east wall in the order it'll be stitched. That's the whole pattern-making system. It's walked up a lot of mountains.
◆ 04 ◆Needles, thread, and why the stitch count matters
Gert and Shirley (the two walking-foot machines on the east wall) run different thread and different needles. Gert — the older Halden-West flat-bed — uses #138 bonded nylon thread and 135x17 organ-needle-point needles in size 22. That's for structural seams: the sling junctions, the haul loop, the bar-tacks at the shoulder anchors, the roll-top stiffener seam. Shirley — her younger servo-converted sister, also Halden-West — runs #69 bonded polyester and size 19 needles, for binding, trim, and finish work.
Stitch count on structural seams is 7 stitches per inch, double-needle where the geometry allows (the roll-top stiffener, the haul panel). Below 7 the seam is a perforation — imagine the comics trick of tearing along a dotted line — and will fail in a predictable way under tensile load. Above 10 and you've put so many holes through the cloth that you've weakened it from the other direction. Seven is the number I settled on after a long correspondence with a retired sailmaker in San Pedro who learned it from his own retired sailmaker.
◆ 05 ◆Hardware: brass, copper, bridle leather
The brass roller buckles and G-hooks come from a small foundry up in the Palouse. They pour in lost-wax sand molds, cold-bend, and tumble their pieces clean in walnut shell. Every buckle gets tested by hand against a 450-lb static load pull before it leaves their bench. That's not a marketing number — it's what's noted on the packing slip, because their foreman believes in packing slips.
Rivets are #9 copper with copper burrs, set with a hand-peen against a bench block. A pneumatic rivet setter does the same job in a third the time and makes flatter heads. I tried one in 2014. The flatter heads tend to loosen over a decade of flex cycles; the hand-peened domes do not. I went back to the peen, and there's a perfectly good pneumatic setter in the mezzanine if anyone wants to argue otherwise.
Leather is bridle, drum-dyed, from a tannery in Walsall I've been buying from for fourteen years. Strap blanks get cut on the clicker press from the best part of the side — the "butt," the rump of the hide, which has the tightest fiber structure. Cheaper leather (veg-tanned shoulder, say) would work. For about three years. Then it'd stretch and need replacement. The bridle from Walsall doesn't.
◆ 06 ◆The mistakes that taught the method
There were a lot of these. A few worth naming:
Batch 03, 2011: I used commercial pre-waxed 12oz duck for six packs because a bolt came cheap at auction. All six of them failed at the haul loop inside two seasons. That's when I committed to waxing my own cloth. The six packs came home one by one; I rebuilt them from proper 14oz at no charge. Took most of a winter.
Batch 09, 2014: Switched to size 24 needles to push faster through the double layers at the bar-tack points. The holes the needles left were, in retrospect, too large for the 138 thread to fill, and two packs from that batch developed water-weep at the haul panel over a wet season. I went back to size 22, re-waxed the affected panels to close the weave, and made a note in the ledger in red pencil that still sits a foot from the machine.
Batch 22, 2019: Tried a synthetic acetal buckle on a trial run because a customer asked. Held fine at 60°F. Failed at -20°F on the second trip, right when the customer needed it. I flew two replacement brass buckles to him overnight — the only time I've ever used overnight mail for a repair — and haven't deviated from brass since. The customer is now on the standing list for a second pack, which I consider an even trade.
◆ 07 ◆Final check, hook, and postcard
Every finished piece goes on the inspection hook by the west window. I load it with sandbags to spec (Model 03 at 55 lb, the bedrolls to compression only, the repair rolls to full) and hang it overnight. In the morning I check every seam, every rivet, every buckle-travel, every brass face for a rough cast I missed. I stamp my initials — R.P. — in iron-gall ink on the liner, punch the serial tag, note it in the ledger, and wrap the piece in a waxed-paper bundle tied with a length of latigo scrap.
The last thing before the box gets sealed: a handwritten postcard goes in the lid pocket. Welcome to the standing list. Write when you're back. Roughly one in three folks does. Those are the ones whose trips end up on the Trips page. The other two — well, I know where they're carrying the pack. That's almost as good.