TINJAUAN KUALITAS GENTENG BERGELASIR PRODUK UNIT UJI DI UNIVERSITAS NEGERI YOGYAKARTA BERDASARKAN HASIL UJI LABORATORIUM BAHAN BANGUNAN

Abstract

Abstract
This Unit UJI Program aims to: (1) add income for UNY and its
academic members, (2) supply facilities for the lecturers and students to
conduct research and community service activities, (3) prepare new jobs in
the glazuur material industry sector, and (4) give opportunities and working
experience (new work field) for the UNY students.
The development of the glazuur material products applies certain
chemical reaction principles affected by composition (chemical substance
concentration), reaction temperature, chemical characteristic, and physical
characteristic of the chemical substance. Variations of the concentration,
temperature, and chemical substance in a chemical reaction will produce
various glazuur colors. The product development method was conducted by
an experimental research in the Building Material Laboratory and the
Chemical Laboratory UNY. The marketing strategy runs by promotion
through regional and national expo activities and direct selling to
consumers. The product marketing runs through PT. UNY MULTI
UTAMA, the ceramic tile industry ”PWS” Godean, and Timboel Keramik
Kasongan.
The business products of the UJI unit in UNY are categorized into
three groups: (1) glazuur materials, (2) glazuur tiles, and (3) glazuur
ceramics. Various glazuur colours being produced are green, blue, brown,
black, grey, yellow, chromic red, lead chromic red, and oxcyde. The
business product specifications having been produced are: (1) the glazuur
materials have an added value in aesthetics because they have various bright
colors and the burning temperature is lower compared to the existing
marketed glazuur materials, (2) the glazuur tiles have more aesthetical
appearance, not porous, smoother surface, and higher elastical strength and
lower water absorption compared to non-glazuur materials, (3) glazuur
ceramics have smaller surface pores compared to non-glazuur materials so it
will not wet although they are exposed with water for 48 hours. The
liquefied test in the buffer solution with pH4 shows that there are metals in
liquefied glazuur materials, but the amount is still below the threshold, so it
will not endanger the environment. Although the incubation period of
DP2M has been over, the business prospect of the glazuur material UJI unit
Inotek, Volume 13, Nomor 2, Agustus 2009
136
is predicted to succeed because of the raw material availability in relatively
cheap cost but relatively high product selling values.
Keywords: glazuur materials, ceramics, and tiles