how did ancient sword smiths cut grooves & patterns on the steel blades?

they etched them in before the blade was cooled.

Blades of steel

Yamaha WR250F 02-08 Saw Blade Front Brake Rotor Stainless Steel $44.95

9″ TACTICAL STAINLESS STEEL MILITARY SURVIVAL KNIFE Hunting Bowie Fixed Blade $0.01

MOVIE THE STORM WARRIORS MIGHTY SWORD W/ GUN METAL BLACK BLADE 1:1 REPLICA STEEL $49.99

Retractable Stainless Steel Blade 2M Measuring Tape $4.95

7″ Hunting Knife Black Tactical Carbon Steel Blade / Fire Starter 5734 $0.99

7″ Hunting Knife Black Tactical Carbon Steel Blade / Fire Starter 5736 $0.99

7″ Hunting Knife w/ Finger Hole Carbon Steel Blade 5860 $0.99

New Stainless Steel Uncapping KNIFE extracting 10″ (250mm) blade length $0.01

New Stainless Steel Uncapping KNIFE extracting 6″ (150mm) blade length $0.01

New Stainless Steel Uncapping KNIFE extracting 8″ (200mm) blade length $0.01

New Stainless Steel Uncapping KNIFE extracting 8″ (200mm) blade length $0.01

Yamaha Banshee Blaster Blade Rear Brake Rotor Stainless Steel $44.95

S0132 KINGDOM OF HEAVEN CRUSADER IBELIN SWORD W/ PLAQUE UNSHARPENED STEEL BLADE $124.99

OLFA PRO 9mm Stainless Steel SNAP-OFF BLADES AB-10S 9281 10 PACK X 2 (20 blades) $9.99

Blades of Steel NES Nintendo Vintage game $6.99

Honda TRX 250R 86 87 88 89 Saw Blade Rear Brake Rotor Stainless Steel $44.95

Honda ATC 250R 1985 1986 Saw Blade Rear Brake Rotor Stainless Steel $44.95

PING-BLACK DOT- A BLADE PUTTER 35″ (NO COVER) $49.00

Stainless Steel Blade Plastic Handle Scissors Cutter $4.03

Honda 400EX 99-08 Saw Blade Rear Brake Rotor Stainless Steel $44.95

S2402 NEW US U S CIVIL WAR CAVALRY CEREMONIAL SABRE SWORD STEEL ENGRAVINGS BLADE $84.99

S2601 NEW FANTASY WESLEY SNIPES MOVIE TV FILM BLADE STEEL SWORD W/ BACK BELT $94.99

S2629 NEW JAPANESE ANIME ONE PIECE SAURON SWORD STEEL SHINY WAVY BLADES LOT 4 $279.99

PERSONNA STERILE STAINLESS STEEL SURGICAL BLADES No.2 VINTAGE $4.98

FREDDY KRUEGER Steel Finger Blade 3D Buckle Belt BL028A $4.99

S3111 NEW JAPANESE ANIME ICHIGO KUROSAKI COSPLAY SWORD GUN METAL STEEL BLADE $74.99

New Commercial Stainless Steel French Fry Frys Cutter 4pc Blade – 3/8″ 1/2″ 3/4″ $87.95

S3311 MOVIE BOROMIR LORD OF THE RINGS SWORD w/ PLAQUE SHINY STEEL BLADE A FULLER $114.99

UNIQUE STAINLESS STEEL “RAZOR BLADE” DOG TAG PENDANT $4.98

Mossberg 2 PC KNIVES IN NYLON SHEATH, CAMOUFLAGE ALUMINUM HANDLES, STEEL BLADES $34.99

S4303 MOVIE LORD OF THE RINGS ARAGORN SWORD W/ SCABBARD STAINLESS STEEL BLADE $94.99

Kitchen Shears Steel Blade Multi-Purpose Scissors $2.00

S4343 MOVIE THE STORM WARRIORS BLOOD SUCKING SWORD SHINY STEEL CRESCENT BLADE $129.99

Kitchen Shears Steel Blade Multi-Purpose Scissors $2.00

Kitchen Shears Steel Blade Multi-Purpose Scissors $2.00

Kitchen Shears Steel Blade Multi-Purpose Scissors $2.00

12″ STAINLESS STEEL MILITARY TACTICAL SURVIVAL KNIFE Bowie Hunting Fixed Blade $0.99

Kitchen Shears Steel Blade Multi-Purpose Scissors $2.00

Kitchen Shears Steel Blade Multi-Purpose Scissors $2.00

Kitchen Shears Steel Blade Multi-Purpose Scissors $2.00

Kitchen Shears Steel Blade Multi-Purpose Scissors $2.00

Kitchen Shears Steel Blade Multi-Purpose Scissors $2.00

Kitchen Shears Steel Blade Multi-Purpose Scissors $2.00

Kitchen Shears Steel Blade Multi-Purpose Scissors $2.00

Kitchen Shears Steel Blade Multi-Purpose Scissors $2.00

Stainless Steel Blades Cut 5 Strips at Once Shred Bank Statement Cancelled Check $5.99

Kitchen Shears Steel Blade Multi-Purpose Scissors $2.00

Kitchen Shears Steel Blade Multi-Purpose Scissors $2.00

Ping A Blade Putter Golf Club $49.95

Thurston Mfg. High Speed Steel .051″ Cutting Mill Saw Blade $25.00

Defender 13.5-inch BlackStainless Steel Curve Blade Heavy Duty Hunting Knife $20.49 Complete Length 13.5″8.5″ Blade Length5″ Handle LengthIncludes Sheath!Stainless Steel BladeHeavy DutyNicely packaged! Black Nylon Sheath Good Grip Handle

Steel Titan Twin-blade Baton Sword $43.49 Collectible sword boasts two blades in one sword Sword has beautiful etched handle Sword length is 33-inches closed

Red Fire Black Blade Stainless Steel Folding Pocket Knife $7.32 This pocket knife is excellently crafted with a 3.25 inch stainless steel blade that has a resilient black coated finish with an easy open tab. It has a convenient pocket clip and aluminum handle that is modernly styled.

Defender 10.5-inch Black Stainless Steel Fish Hook Blade Hunting Knife $16.99 Complete Length 10.5″6″ Blade Length4.5″ Handle LengthIncludes Sheath!Hook BladeNicely Packaged!Black Nylon Sheath Good Grip HandleSerrated Blade

Stainless Steel Swivel Blade Peeler $11.49 Stainless steel swivel blade peeler makes quick work of fruit and veggie skinsPreparation tool with soft, comfortable, non-slip handlesKitchen gadget turns the great drudgery into a near-effortless endeavor

X-Acto Number 11 Stainless Steel Classic Blades (Bulk Pack of 100) $41.69 This X-Acto bulk pack features one-hundred number 11 blades, to be used with X-Acto knives. These blades can be used for cutting, trimming, and stripping paper, plastic, basswood, rubber, vinyl, and foam.

Defender 13.5-inch Black Carbon Steel Straight Blade Heavy Duty Hunting Knife $20.99 Complete Length 13.5″8.5″ Blade Length5″ Handle LengthIncludes Sheath!Carbon Steel BladeHeavy DutyNicely packaged!Black Nylon SheathGood Grip Handle

Defender 10.5-inch Stainless Steel Black Blade Survival Knife $20.99 This Survival Knife from Defender features a very sturdy stainless steel construction with a 5.5-inch blade length. This knife also offers a sturdy design, and includes a black nylon sheath and compass.

Defender 10.5-inch Stainless Steel Blade Survival Knife $20.99 This Survival Knife from Defender features a very sturdy stainless steel construction with a 5.5-inch blade length. This knife also offers a sturdy design, and includes a black nylon sheath and compass.

Heavy Duty 10.5-Inch Survival Blade with Sheath $20.99 This 10.5-inch survival knife from Defender features a 5.5-inch blade and a survival kit insde the handle. Kit is accessed be un-screwing the compass on the end of the handle.