Pentel’s unprecedented first and last flagship mechanical pencil lead, ‘Hi-Polymer For Pro’.
Launched in 1984 alongside the ‘Hi-Polymer 100’, this pencil lead was specially developed for architectural drawings. Before CAD became widespread, drawing architectural plans often involved drawing lines using a ruler. During this process, a lead that did not produce dust was recognized as a high-quality pencil lead at the time. The ‘Hi-Polymer For Pro’ is a premium pencil lead designed to minimize lead dust while maintaining the firm yet smooth writing feel characteristic of the Hi-Polymer series.
As part of a premium marketing strategy, the 0.3mm lead (CS33) was priced at 400 yen for 20 pieces, the 0.4mm lead (CS34) at 300 yen for 20 pieces, and the 0.5mm lead (CS55) at 300 yen for 40 pieces. These were shockingly expensive mechanical pencil leads for the time.
Why Pentel uses 5x5 matrix on LIGHT and 3x3 matrix on SOFT, but not vice versa?
maybe because each square in 5x5 matrix is smaller so it is easier to erase?
I don’t have an answer and it is open for discussion
I know that photo is from the press conference held when the ‘orenznero’ was released. However, there is an error in the photo as well: for the Pentel Kerry (P1035), the actual release year was 1971, but it is listed as 1972 (Showa 47). So, We cannot guarantee that the PG1000 information is error-free.
Above all, the information that the Graph 1000 was released in 1986 is also stated on Pentel’s official website. Regarding this, I will upload a related post soon. Let’s discuss it for accurate information.
