资源简介

(共16张PPT)
扎染漂亮小手帕（第一课时）
年 级：三年级 学 科：劳动
什么是扎染？
扎 染
扎染是中国传统手工染色工艺，也是国家非物质文化遗产之一。扎染是在染色时将织物部分扎结起来，染色后就会形成各种花纹。
纯天然
植物染料
扎染还需要用到哪些工具？
学习制作过程和方法
对称、有规律
折叠大比拼
请同学们尝试用一张白色的小方帕进行折叠，数一数你会几种折法？看一看谁的折法更多？
规则：
学习折法
学习折法
对折法
辐射法
？
扎法：不同的捆扎方式会出现不同的晕染纹样。
你们学到了哪些扎结方法？
长条分段扎结法
中心点分段扎结法
三角形扎结法
五角星扎结法
豆点图案扎结法
皮筋扎法
弹珠扎法
木板扎法
学习染法
浸染法
滴染法
图
(1)扎染的染料—
植物染料
1蓝·蓝草
3人
黄·栀子
染料叫蓝。凡可制取靛青（即靛蓝）的植物，皆可称
古代用酸性来控制栀子染黄的深浅，欲得深黄色，则增加染中
“蓝”。靛蓝的粗制浮沫即中药青黛.蓝草的根即著名中
药板蓝根，其果为中药蓝实。它们皆有杀菌消炎，清热解毒
酷的用显。用栀子浸液可以直接染织物成鲜艳的黄色，工艺简
之药效，可用于防治流脑、流感及肝炎等传染疾病。
单，但栀子染黄耐日晒的能较差，因此自宋以后染黄又被槐花
部分取代。
2红·茜草
4粉·苏木
茜草是一种历史悠久的植物染料，古时称茹蔗、地
血，早在商周的时候就已经是主要的红色染料。
苏木是苏木科苏木属的植物，具有活血祛瘀、消肿止痛的作用
·染色茜草(Rubia tinctorum L.),根含茜草素
苏木内含有苏木红色素，是我国古代若名的红色系染料。
多生于沙地上
5瓶靛青蓝
村
靛青蓝
靛青蓝
靛青蓝
靛青蓝
dye
dye
t-dye
dye
靛青蓝
tie-dye
om位
erng Chiies
eng Co
O
0g
N CHFNA
用0
有0
HADE INCHINA
AD
X
这些都是对称现象。你
还见过哪些对称现象？
1
剪一剪。
像上面这样，先把一张纸对折，再画一画、剪一剪。
Y车B
对称轴
像这样剪出来的图形都是对称的，它们都是轴对称
图形。
做一做
下面哪些图形是轴对称图形？在()里画“√”。
29
eir time.While Washington and Jefferson privately expressed dst
s anew slavery wns wrngand yet most did little to fight it
they also understood that it was part of the political and econon e
red by the
e country they helped to create.
ed distast园
of the country
cconomic
thing,the South
ot
afford to pa
ike having
slaves.Own one thing.the
ar
cek,author ofslik havin
es.Owning
George
ation of Amer
God:George
uthor of An
ates wo
of America.
ned
em states wou
stitution,
otections for
that
orotectionar institution
rposes of co
as three fr purposes
three fifths
0
sent
e statesme
atesmen's
lives ependea
slavery.The three-led Jefferse
three-fifths
efferson his na.w victory in the presidential election of 18wotes of t
n of 1800 by
of the southern states in the Electoral College.Once in onded sla
ce in office,
slavery with the Louisiana Purchase in 1803;the new lan states,ree save states.
ew land was
es,including three slave states.
erson freed Hemings's children-though not Hemings herself or his
n freed Hemings's children-though not Hemings hersein the bravery of the blackson
50 other slaves.Washington,who had begun to believe that al
other slaves.Washington,who had begun to believey War,overcame the strong opposition of his relatives to gran
qual after observing the bravery of the black soldiersreedom in his will.Only a decade earlier,such an act woul
Var,overcame the strong opposition of his relatives islative approval in Virginia.
otheyBt cenmanyn ave
11
八1
1 ysce-cmoppntg【e0em
.......veceny,many nistorians have
n to focus on the mle slavery played in the lives of the founding generation.
n to focus on the role slavery played in the lives of the founding generation.
have heen spurred in part by DNA evidence made available in 1998,which
have been spurred in part by DNA evidence made available in 1998,which
certainly proved Thomas Jefferson had fathered at least one child with his
certainly proved Thomas Jefferson had fathered at least one child with his
Sally Hemings.And only over the past 30 years have scholars examined
ally Hemings.And only over the past 30 years have scholars examined
from the bottom up.Works of several historians reveal the moral
from the bottom up.Works of several historians reveal the moral
mises made by the nation's early leaders and the fragile nature of the
s infancy.
nises made by the nation's early leaders and the fragile nature of the
new slaver
Founding
infancy.More significantly,they argue that many of the Founding
e than anyt
new slavery was wrong-and yet most did little to fight it.
their time.
ered by the
than anything,the historians say,the founders were hampered by the
they als
ssed distaste
their time.While Washington and Jerson privately expressed distast
the countr
nd economic
they also understood that it.
e thing,
the country they helped t
the political and economi
“like havi
ives.Owning
thing,the South
author of An
like having a large
its slaves.Ownir
d:George
states wo
of America.
1:George Washingu
author of A
institutio
rotections for
states would not have
tion of Americ
ourposes
three fifths
nstitution,"including a
nthout protections
ed a slave as three fif
statesme
Jeffers
three-fifths
irposes of congressional rep.
es of tl
n of 1800 by
tatesmen's political lives depd on slavery.The three-fi
ce in office,
ed slavery win tne Louisiana Purchase in 1803;the new land was
Jefferson his narrow victory in the presidential election of 1800
ates,including three slave states.
s of the southern states in the Electoral College.Once in off
on freed Hem
d slavery with the Louisiana Purchase in 1803:the new land

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