Dark coloured malts of the Munich type are often made from two-row spring barley with nitrogen
content up to almost 12 % protein. The barley is fully steeped to a moisture
content of 45 % or more to encourage full modification and the production of large
quantities of low molecular weight carbohydrates and nitrogenous substances which will
subsequently lead to strong melanoidine formation. Kilning regimes are adapted to further
melanoidine development. The first stage of kilning is with an air-on temperature of no
greater than 40° C, which will lead to "stewing". Germination continues at an accelerated
rate with enhanced enzymatic activity. After several hours of stewing the temperature is
raised to 50° C and eventually to 80 - 85° C to achieve colours of 14 - 18 ° EBC. Green
malt often made from relatively high TN barley, is subjected to a stewing stage after
loading to kiln. The recycling of saturated exhaust air raises the grain bed temperature
and encourages autolyse processes within the endosperm. Liberated low molecular weight
nitrogen compounds and sugars react in the later stages of kilning to give relatively
highly coloured malts.
These malts are used in the production of the traditional dark (Dunkles) beers and some
special celebration beers in central Europe. It takes its name from the city of Munich,
which was famous for such beers.
Munich Malt: Typical Specification |
|
IOB |
EBC |
ASBC |
Minimum Extract (dry basis) |
302 |
80.0 |
80.0 |
Maximum Moisture (%) |
4.5 |
4.5 |
4.5 |
Colour (EBC/SRM) |
9 - 12 |
14 - 18 |
7 - 10 |
Notes:
1. IOB extracts are reported at mill setting 0.7mm, EBC and ASBC extracts are reported at
mill setting 0. 2mm.
2. IOB and ASBC values are included for guidance only and malts are supplied on the
basis of EBC Analysis.
IOB colour values are expressed in terms of 515 ml mashes. A new revision of IOB
Methods will be available in 1997 where the convention will change to the expression
of colour on 450g mashes. This will effectively raise the reported colour value by 0.5
degrees EBC over those shown above.
Munich Malt: Typical Analysis |
|
IOB |
Extract (dry) |
75.9% |
Moisture |
3.8% |
FCD |
2.0 |
Colour |
17° EBC |
Total Protein |
11.5% |
Kl |
39 |
Wort pH |
5.54 |
Wort Viscosity |
1.71 cP |
Diastatic Power |
145 WK |
Alpha Amylase |
30DU |
|