Not enough weed for that big of a bag and the bag just ends up absorbing the juice... At the very least you're gonna wanna use more weed and pack it tight into the bag just so some of it can leak out. Every bit of air that's in that bag before you press it will steal your rosin. If you're just gonna squish a little bit like that, squeeze the weed into a ball as tight as you can with your fingers and just stick it between the parchment. I wouldn't recommend pressing anything less then 1/8 though a bag. Look through last night's live stoner posts and you'll see how I pack my bags. You can save that bag and everything inside to cook with