how I stitch teabag paper ...

... it's not as fragile as you might think

*

first of all: 

no knots

knots are too bulky and sometimes pull right through

I lock the first stitch in with a single backstitch and leave a bit of a tail

secondly:

use a running stitch 

if you punch in and out, stitch by stitch, you are more like to get tears

a running stitch keeps the paper more stable

third:

lock in your last stitch with a single backstitch

do this, whether you are done and will be cutting the thread,

or as in these hexagons, if you are turning a corner and need added strength 

 finger pressing is all that is needed for these somewhat fragile seams

so this is the back:

and this is the front after quilting:

there isn't much to tell about the quilting

except: a running stitch is best

also: you will find that the more stitching you do (as in sashiko)

the stronger it all becomes

I will show more pictures as I fill this in with sashiko type stitching

Sashiko: a form of decorative and functional stitching from Japan. 

Used in mending and reinforcing worn fabric or areas of fabric destined for wear (and tear).  

Most frequently used is white thread on indigo fabric.