Sejarah sakatas kertas kraft
Ing wiwitan abad kaping 19, nalika industri ritel gedhe durung lair, umume masarakat tuku kabeh barang saben dinane ing toko kelontong cedhak papan dununge utawa papan dununge. Kabutuhan saben dinane dikemas ing barel kayu, tas kain utawa kothak kayu lan dikirim menyang toko akeh, nanging cara adol menyang konsumen kanthi nyebar yaiku ngelu. Wong mung bisa blanja nganggo kranjang utawa tas sprei krasan. Nalika semana, bahan baku kanggo nggawe papermaking isih serat serat lan kain seprei lawas, kanthi kualitas sithik lan jumlah langka, sing malah ora bisa nyukupi kabutuhan nyithak koran. Udakara taun 1844, Jerman Friedrich Kohler nyipta teknologi papermaking pulp kayu, sing ningkatake pangembangan industri kertas lan kanthi ora langsung nglairake tas kertas komersial pisanan ing sejarah. Ing taun 1852, ahli botani Amerika Francis Waller nggawe mesin nggawe tas kertas pertama, sing banjur dipromosekake menyang Prancis, Inggris lan negara-negara Eropa liyane. Banjur, kelairan tas kertas kayu lapis lan kemajuan teknologi jahitan tas kertas nggawe tas katun digunakake kanggo transportasi kargo akeh diganti tas kertas.
Ngomong babagan tas kertas kraft sing pertama kanggo blanja, lair ing taun 1908 ing St. Paul, Minnesota, AS. Pamilik toko kelontong lokal Walter Duvina, kanggo promosi pertumbuhan sales, wiwit golek cara supaya para konsumen bisa tuku barang liyane sekaligus. Du Weiner yakin manawa kudu tas prefabrikasi sing murah lan gampang digunakake, lan paling ora bisa udakara udakara 75 pon. Sawise eksperimen bola-bali, dheweke ngunci tekstur tas kasebutkertas kraft, because it uses the long conifer pulp of wood fiber, and in the cooking process, it is treated by chemically mild caustic soda and soda sulfide chemicals. The original strength of wood fiber is less damaged, so the final paper produced has tight connections between the fibers, the paper is tough, and can withstand greater tension and pressure without breaking. Four years later, the first kertas kraft bag for shopping was born. Its bottom is rectangular, which has a larger volume than the traditional V-shaped bottom paper bag. A rope runs through the bottom and both sides of the bag to increase its load-bearing capacity, and two pull loops are formed on the upper end of the paper bag that are convenient for people to lift.
