Mash rest time

[wvjohnabeer]

I read Jamils book Brewing Classic Styles and decided to brew the Dusseldorf Altbier .
The mash is 149. It said that being low temp to lengthen the rest time to 90 min. What does the rest time mean?

kind regards

 

[laredo7mm]

Let your grains steep in the 149° mash water for 90 minutes before draining and sparging.

 

[wvjohnabeer]

Thank you

 

[kh54s10]

Most recipes call for you to get to a certain temperature of the mash and try to hold it there for 60 minutes. This one is lower in temperature and to be assured there is time for full conversion it calls for mashing for 90 minutes.